Afghan Crochet Patterns

Riley's Rainbow Mosaic Blocks Afghan Free Pattern

Anonymous 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.