Update June 21, 2023. Now with interlocking filet crochet!

You require two colors of yarn. For example, green (peacocks, branches and leaves) and white (the background). For the three-color version, you also need yarn for peacocks, for example, red.
I don’t give an explanation of Color Changing & Carrying the Yarn for the overlay mosaic three color option. You can find a lot of useful videos on YouTube and choose the one you like best.
For the three-color interlocking, I have a video tutorial for changing colors in one row. If you want to make such a blanket using this technique, I recommend practicing with a small project first. https://www.ravelry.com/patterns/library/butterfly-130

Technique: Overlay Mosaic crochet and Interlocking Filet crochet full width bottom up row by row or main panel bottom up and the envelope border in the round (the border in the round for interlocking crochet).

If you would like to make such a blanket with a design on the wrong side, the files have explanations of the technique and a written pattern for doing so.

Below are two yardage options for sports and fingering yarn.

Yarn: for example, Scheepjes Stone Washed
Yarn weight: Sport. Ball weight: 50 g, yarn length:130 m (142.17 yds).
Gauge: 10 stitches in 5cm (2”) by 5 rows in 5cm (2”) in dc stitch pattern.
Hook 3.25 – 3.5 mm. Hook size needed to match the gauge.
Yardage for the main panel approx. 2050 m of green, 1500 m of red, 3850 m of white. (2242 yds of green, 1640 yds of red, 4210 yds of white)
• for double sided main panel approx. 2750 m of green, 1700 m of red, 4500 m of white. (3010 yds of green, 1860 yds of red, 4920 yds of white)
Yardage for RS of the envelope border in the round approx. 600 m of green, 500 m of white. (656 yds of green, 547 yds of white)
• for striped WS approx. 500 m of green, 400 m of white. (547 yds of green, 438 yds of white)
Size: 150 cm wide and 210 cm long (301 stitches by 421 rows, 59 inches wide and 82½ inches long).

Yarn: for example, Scheepjes Whirl, Whirlette
Yarn weight: Fingering. Ball weight: 215 g, yarn length:1000 m (1093.61 yds) or ball weight: 100 g, yarn length: 455 m.
Gauge: 13 stitches in 5cm (2”) by 7 rows in 5cm (2”) in dc stitch pattern.
Hook 2.5 mm. Hook size needed to match the gauge.
Yardage for the main panel approx. 1350 m of green, 1000 m of red, 2600 m of white. (1476 yds of green, 1094 yds of red, 2844 yds of white)
• for double sided main panel approx. 1850 m of green, 1200 m of red, 3000 m of white. (2024 yds of green, 1313 yds of red, 3280 yds of white)
Yardage for RS of the envelope border in the round approx. 400 m of green, 350 m of white. (438 yds of green, 383 yds of white)
• for striped WS approx. 300 m of green, 250 m of white. (328 yds of green, 273 yds of white)
Size: 118 cm wide and 147 cm long (301 stitches by 421 rows, 46½ inches wide and 57¾ inches long).