Free Rainbow Hexi Blanket Tutorial: Crochet a Colorful Masterpiece Step by Step
If you’ve been scrolling through crochet communities lately, chances are you’ve spotted the rainbow hexi blanket popping up everywhere — and for good reason. This stunning project combines the satisfying geometry of hexagon motifs with the joyful energy of a full spectrum of color, creating a blanket that feels like a celebration every time you look at it. Whether you’re an experienced crocheter looking for your next big project or someone who has mastered the basics and wants to level up, this free rainbow hexi blanket tutorial will walk you through everything you need to know from your very first stitch to the finished, woven-in ends.
This tutorial is completely free. No patterns to purchase, no paywalls to click through. Just grab your hook, your yarn, and let’s make something beautiful together.
What Makes the Rainbow Hexi Blanket So Special?
Before we dive into the how-to, it’s worth talking about why this blanket has captured so many hearts. Hexagon blankets have a long history in the fiber arts world — they appear in grandmother’s squares, classic granny afghans, and modern geometric quilts. The six-sided shape tiles together perfectly, creating a honeycomb structure that is both visually striking and structurally sound.
When you layer that hexagon foundation with a full rainbow color palette, something magical happens. The blanket becomes a record of color, a gradual journey from warm reds and oranges through golden yellows, vibrant greens, cool blues, and dreamy purples. Making a rainbow hexi blanket is also a fantastic stash-busting project, because each motif uses only a small amount of yarn, giving you a great excuse to pull out every colorful skein you’ve been hoarding.
The joining method used in this tutorial — slip stitching hexagons together through the back loops — creates a subtle textured ridge that adds even more dimension to the finished piece. The result is a blanket that looks complex but is built from one simple, repeating motif that you’ll have memorized after your first dozen hexagons.
Materials You’ll Need
Getting your materials together before you start will save you from stopping mid-project to hunt for the right hook or realize you’re out of a certain color.
For yarn, you’ll want a worsted weight yarn in as many rainbow colors as you’d like to use. The traditional ROYGBIV palette — red, orange, yellow, green, blue, indigo, and violet — works beautifully, but don’t feel locked in. You can use a warm rainbow that skips the cool purples, a pastel rainbow with soft, muted tones, or a neon rainbow with high-contrast brights. The structure of the pattern is the same no matter what colors you choose.
For a generous lap blanket measuring approximately 48 by 56 inches, plan on roughly 200 grams per main color if you’re working in seven shades, plus a neutral color (white, cream, or soft gray) for the final round of each hexagon, which ties all the motifs together visually. For a full throw or bed blanket, scale up accordingly. Popular yarn choices for this project include Lion Brand Pound of Love, Caron Simply Soft, Red Heart Super Saver, and Paintbox Simply DK (though if using DK weight, size down your hook slightly).
You’ll also need a size 5mm (US H/8) crochet hook for worsted weight yarn, scissors, a yarn needle for weaving in ends, and blocking mats and pins if you’d like to block your finished hexagons before joining (optional but recommended for a polished result).
Understanding the Hexagon Structure
Each hexagon in this blanket is worked in the round, starting from a central ring and building outward in concentric rounds. A finished hexagon for this pattern measures approximately 5 inches from flat side to flat side, which is called the width, or about 5.75 inches from point to point.
Every hexagon is worked across four rounds. The first three rounds establish the shape and introduce the main color for that motif. The fourth and final round is worked in your neutral joining color, which frames each hexagon and makes the overall color arrangement look cohesive and intentional rather than chaotic.
One of the great joys of a hexagon blanket is that you can work on it anywhere. Each motif takes roughly 20 to 30 minutes to complete depending on your speed, which means you can finish a hexagon during a TV episode, on a lunch break, or while waiting in a car. Over weeks and months, your pile of motifs grows into a blanket.
The Free Rainbow Hexi Blanket Pattern
Abbreviations Used
Throughout this pattern, the following abbreviations are used: ch (chain), sl st (slip stitch), sc (single crochet), dc (double crochet), sp (space), and rep (repeat). The pattern is written for US crochet terminology.
Round 1: The Center Ring
To begin your hexagon, make a magic ring or chain 4 and join with a slip stitch to form a loop. If you’re new to the magic ring, the chain-4 method works just as well and is easier for beginners.
Chain 3 (this counts as your first double crochet throughout the pattern). Work 11 more double crochets into the ring for a total of 12 double crochets. Join with a slip stitch to the top of the beginning chain-3. Pull the magic ring tail snug to close the center hole. You should have 12 stitches in a tight circle.
Fasten off and weave in the tail, or carry the color up if you prefer, though fastening off gives cleaner color separation.
Round 2: Building the Hexagon Shape
Join your main color (or continue if you didn’t fasten off) with a slip stitch to any stitch from Round 1.
Chain 3 (counts as first dc). Work 1 more dc in the same stitch (2 dc total in the first stitch). Work 1 dc in the next stitch. Work 2 dc in the next stitch, 1 dc in the following stitch. Repeat the instructions between the asterisks 4 more times for a total of 6 repeats around the hexagon. Join with a slip stitch to the top of the beginning chain-3.
At the end of Round 2, you’ll have 18 double crochets arranged with increases creating the six points of your hexagon shape beginning to emerge.
Fasten off or continue in the same color for Round 3.
Round 3: Defining the Corners
This round is where the hexagon truly takes shape, with clear corners appearing thanks to chain-2 corner spaces.
Join your color in any stitch. Chain 3 (counts as first dc). Work 1 dc in the same stitch. Chain 2, skip 1 stitch, work 1 dc in each of the next 2 stitches, chain 2, skip 1 stitch, work 2 dc in the next stitch (corner made). Repeat the section between asterisks 5 more times, working the final corner increase in the same stitch as your starting chain-3. Join to the top of chain-3 with a slip stitch.
You now have a clearly recognizable hexagon with 6 defined corners separated by chain-2 spaces. The sides of your hexagon each have 2 double crochets between the corners.
Fasten off this color. You’re now ready for the final neutral round.
Round 4: The Neutral Border Round
This is the round that will be worked in your neutral color for every single hexagon in the blanket. It’s the secret to making your rainbow arrangement look polished and intentional, because the uniform border ties all the motifs together regardless of how different their center colors are.
Join your neutral color to any corner chain-2 space.
Chain 3 (counts as first dc). Work 2 more dc in the same corner space (3 dc in corner space). Work 1 sc in each dc across the side of the hexagon until you reach the next chain-2 corner space. Work 3 dc in the corner space. Repeat the section between asterisks around all six sides of the hexagon. At the end, work 1 sc in each remaining dc on the last side. Join with a slip stitch to the top of the beginning chain-3.
Fasten off and leave a tail of approximately 8 inches for joining, or weave in the end if you’ll be using a separate joining yarn.
Blocking Your Hexagons
This step is optional but makes a noticeable difference in the finished blanket. Wet blocking your hexagons before joining them ensures they all measure the same size, lay flat, and press together neatly without any puckering or warping.
To block a hexagon, wet it thoroughly under cool water, gently squeeze out the excess water without wringing it, and then pin it to your blocking mats at all six points and along each side. Use a ruler or a printed hexagon template to make sure each one is consistent. Allow to dry completely before unpinning.
If you’re working with an acrylic yarn and want a quicker option, you can also steam block by hovering a steam iron a few inches above the pinned hexagon. Never press the iron directly onto acrylic yarn, as it can melt the fibers.
Planning Your Color Layout
Before you begin joining, lay all your hexagons out on the floor or a large table to plan the color arrangement. This is one of the most satisfying parts of the whole process, and it’s worth taking your time.
For a traditional rainbow gradient, arrange your hexagons in diagonal stripes of color flowing from one end of the blanket to the other, with red at one corner, transitioning through orange, yellow, green, blue, and purple toward the opposite corner. The neutral border on each hexagon helps blend the transitions so the color changes feel gradual rather than abrupt.
Another popular arrangement is a scattered rainbow, where the hexagons of each color are distributed randomly across the blanket for a confetti-like effect. This approach is great if you have uneven quantities of each color and want to balance them out visually.
A third option is a concentric rainbow, where you build outward from a center hexagon in rings of color — one red center surrounded by a ring of orange, then yellow, then green, and so on. This creates a circular rainbow medallion effect that is absolutely breathtaking.
Take a photo of your layout before you start joining so you can refer back to it as you work.
Joining Your Hexagons
The join-as-you-go method or the flat slip stitch join are both popular for hexagon blankets. This tutorial uses the flat slip stitch join worked through back loops only, which creates a subtle textured seam that lies flat and adds a nice detail to the right side of the blanket.
To join two hexagons, hold them together with wrong sides facing. Using your neutral color and crochet hook, insert the hook through the back loops of both hexagons at once, yarn over, and pull through to make a slip stitch. Continue slip stitching through both back loops along the entire shared side until you reach the corner. When joining multiple hexagons at corners, simply pass through the corner point of all touching hexagons at once for a tidy intersection.
Work across the grid row by row. First, join all your hexagons into horizontal strips, then join the strips together. This methodical approach keeps everything organized and ensures your color layout stays exactly as planned.
The Border
Once all your hexagons are joined, you may want to add a border to finish the edges neatly. Because hexagons don’t tile into a rectangle with straight edges, you’ll have a slightly jagged outer edge with some half-hexagon gaps along the perimeter.
One clean approach is to fill those gaps with half-hexagon motifs worked in your neutral color, which creates perfectly straight edges and gives the blanket a polished rectangular shape. Alternatively, you can work a simple single crochet border in your neutral color directly into the outermost edge, working additional stitches at the outer points and decreasing at the inner points to follow the natural zigzag shape. After a few rounds of single crochet, the edge will appear relatively straight.
For a really striking finish, work one final round of reverse single crochet (also called crab stitch) around the entire perimeter. This creates a lovely twisted cord effect that gives the blanket a professional, finished look.
Tips for Staying Organized on a Big Project
A blanket with dozens or even hundreds of hexagons can feel overwhelming if you don’t have a system. A few practical habits will make the project much more enjoyable.
Keep all your completed hexagons for each color in separate zip-lock bags so they don’t get mixed up. Use a simple tally to track how many you’ve completed in each color — it’s deeply satisfying to watch those numbers grow. If you’re making hexagons during stolen moments throughout the day, keep a project bag packed with your current color, a few yards of yarn already cut, and a pair of scissors so you can start immediately whenever you have a few minutes.
Setting small milestones also helps keep motivation high on a long project. Celebrate every completed color run, every completed row of joined hexagons, and every time you finish a bag of yarn.
Caring for Your Rainbow Hexi Blanket
Most worsted weight acrylic and acrylic blend yarns can be machine washed on a gentle cycle in cool water and laid flat or tumble dried on low heat. Always check the yarn label for the specific fiber content you chose, as natural fibers like cotton or wool may require hand washing and flat drying.
Storing the finished blanket folded or rolled rather than hanging will prevent stretching over time. If you notice any hexagons starting to pull away from their neighbors after heavy use, a few reinforcing stitches with a yarn needle will secure them quickly.
Final Thoughts
The rainbow hexi blanket is one of those projects that gives back as much as you put in. Every session at the hook adds another hexagon to your pile, every color run completed feels like a small victory, and when you finally lay the finished blanket out and see all those colors flowing together in their honeycomb arrangement, the satisfaction is something that’s very hard to describe to anyone who hasn’t crocheted.
This project is ideal for all skill levels from advanced beginner upward. If you can chain, single crochet, double crochet, and join with a slip stitch, you have everything you need to make this blanket. The repetitive nature of working the same four-round motif over and over is deeply meditative, and the color work keeps things interesting enough that you’ll never feel bored.
Share your finished blanket and your in-progress hexagon piles in your favorite crochet communities — rainbow hexi blankets are the kind of project that genuinely delights other crafters, and there’s a whole community of people out there making them alongside you.
Happy crocheting!
