Flowers and Butterflies pattern, large blanket size, 301 by 421 stitches (150 by 210 filet windows for interlocking filet crochet).

These blankets are similar to each other, but still differ

For options 1 and 2, I prepared patterns for interlocking and overlay mosaic crochet: the main panel bottom up and the border in the round.
For option 3, the whole blanket bottom up for interlocking technique.

For all three options, I made a written pattern and charts for overlay mosaic crochet bottom up.

But I don’t give an explanation of Color Changing & Carrying the Yarn for Overlay Mosaic crochet. You can find a lot of useful videos on YouTube and choose the one you like best.
For Multicolor Interlocking filet crochet, I released a detailed video tutorial on my Patreon.

Yardage

1. approx. 3500 m of black yarn and 4000 m of all other colors (excluding the wrong side of the border)
(a black yarn - 3828 yards, yarn of various colors - 4375 yards, excluding the wrong side of the border)

2. approx. 3500 m of white yarn and a total 4000 m of all other colors (excluding the wrong side of the border)
(a white yarn - 3828 yards, yarn of other colors - 4375 yards, excluding the wrong side of the border))

3. approx. 3500 m of white and the same amount of blue yarn, leftover yarn of a different colors for butterflies.