Here is a clear and easy step-by-step tutorial showing how to make this 4-color corner-to-corner (C2C) granny square like in your picture.
(I will explain exactly how to crochet each colored triangle.)
🧶 FULL DETAILED TUTORIAL — 4-Color C2C Granny Square
⭐ Structure of the square
The square is made of 4 triangles:
[ A ] [ B ]
[ D ] [ C ]
Each triangle is made using granny clusters (3 DC) worked in corner-to-corner style.
🟦 TRIANGLE 1 (Top Right – Blue in your picture)
Row 1
- CH 4
- In the 4th chain, make 3 DC
→ You now have 1 small block.
Turn your work.
Row 2
- CH 4 (counts as 1 block)
- Make 3 DC in the base of your CH
- Go to last row’s square → insert hook in the side space
- Make 3 DC in that space
Turn your work.
Row 3
- CH 4
- 3 DC in the base of that CH
- Into next open space → 3 DC
- Into last open space → 3 DC
Turn.
Continue
Repeat the pattern:
- CH 4
- Make 3 DC under that chain
- Make 3 DC in each space along the side
Stop when your triangle has 5 rows (same size as picture).
Cut yarn.
🩷 TRIANGLE 2 (Top Left – Pink)
This triangle is joined to the blue triangle while growing.
Join yarn
Insert hook in the top corner of the blue triangle and attach pink yarn.
Row 1
- CH 4
- 3 DC in the base of the CH
(no joining needed yet)
Turn.
Row 2
- CH 4
- 3 DC in the base
- SL ST to the first open space on the side of the blue triangle
- CH 3
- 3 DC in the same space—this connects them
Turn.
Row 3
- CH 3
- 3 DC in the base of the CH
- SL ST to next open space of the blue
- CH 3
- 3 DC in same space
- Repeat until the end of the row
Turn.
Continue
Keep making rows, always:
- CH 3 at start
- 3 DC
- SL ST into a blue space
- CH 3 + 3 DC in that space
Stop when triangular size matches blue.
Cut yarn.
⚪ TRIANGLE 3 (Bottom Left – White)
Attach white yarn to the bottom side of the pink triangle.
The steps are identical to Triangle 2, but join to Pink.
Each row
- CH 3 (or CH 4 if starting new increase row)
- Make 3 DC in the base
- SL ST into next open space on PINK triangle
- CH 3
- Make 3 DC in same space
- Continue across
- Turn and repeat
Stop when triangle matches the others.
Cut yarn.
🩶 TRIANGLE 4 (Bottom Right – Gray)
This triangle attaches to two sides:
- one side to White
- one side to Pink or Blue (depending on orientation)
Attach gray yarn to bottom corner of white.
Row 1
- CH 4
- 3 DC in the base of CH
Turn.
Row 2
- CH 4
- 3 DC in the base
- SL ST to first space on white
- CH 3
- 3 DC in same space
Turn.
Row 3 and all next rows
Each row will attach to two triangles:
✔ SL ST into white side
✔ When reaching the top of the row, SL ST into blue/pink junction
✔ Work 3 DC clusters in each space
Continue until the entire square fills in.
Cut yarn and weave ends.
🧵 OPTIONAL CLEAN-UP ROUND (if you want smooth borders)
Round 1:
- Attach any color
- Work 1 DC, CH 1 into each space around
- In corners: (1 DC, CH 2, 1 DC)