Afghan Crochet Patterns

Riley's Rainbow Mosaic Blocks Afghan Free Pattern

KnittingLoop | Yarn & Stitch Creations • July 18, 2026
Riley's Rainbow Mosaic Blocks Afghan Free Pattern

Riley's Rainbow Mosaic Blocks Afghan Free Pattern

Introduction

Dive into a world of vibrant colors with Riley's Rainbow Mosaic Blocks Afghan. This cozy and intricate design features a stunning array of textured blocks, perfect for adding a splash of color to any room. Whether you're snuggling up on the couch or adding a pop of color to your decor, this afghan is sure to brighten your space!

Materials Needed

  • Yarn: Worsted weight yarn in 7 rainbow colors (Red, Orange, Yellow, Green, Blue, Indigo, Violet)
  • Hook: Size H (5.0 mm) crochet hook
  • Gauge: 12 double crochets (dc) and 7 rows = 4 inches

Step-by-Step Instructions

Block Instructions

This afghan is made up of individual crocheted blocks that are later joined together. Each block is worked in a different color, creating a beautiful mosaic effect. Follow these detailed steps to create each block:

  1. With Color A, chain (ch) 21.
  2. Row 1: Double crochet (dc) in the 4th chain from the hook and in each chain across. Turn. (You should have 18 dc)
  3. Row 2: Chain 3 (this counts as your first dc), then dc in each dc across. Turn.
  4. Rows 3-10: Repeat Row 2 for a total of 9 rows (including Row 1).
  5. Fasten off and weave in ends using a yarn needle.

Repeat the above block instructions using Colors B, C, D, E, F, and G to create a total of 42 blocks (6 blocks in each color).

Assembly

  1. Arrange the blocks in a 6x7 grid, alternating colors to create a rainbow effect. Take your time to find a layout that you love!
  2. Join the blocks together using a whip stitch or your preferred joining method. Make sure to align the edges neatly for a polished look.

Border

  1. With Color A, join yarn in any corner of the assembled afghan.
  2. Round 1: Chain 3, then dc evenly around the entire afghan. Work 3 dc in each corner to keep the border smooth. Join with a slip stitch (sl st) to the top of the chain-3.
  3. Round 2: Chain 3, then dc in each dc around, again working 3 dc in each corner. Join with a slip stitch to the top of the chain-3.
  4. Fasten off and weave in any remaining ends.

Your cozy and colorful Riley's Rainbow Mosaic Blocks Afghan is now complete! Enjoy the warmth and beauty it brings to your home.