Welcome to Let it Glass
This pattern is in mosaic crochet, using the Overlay method (also known as: the one row method or Tinna’s method) worked in rows.
This blanket is called Let it Glass. The inspiration for the blanket is leaded glass, which I love. The idea is that you’re looking through a leaded glass window to a beautiful view outside. The blankets shown here are inspired by a fall view and a summer view.
I for one can’t wait to see what beautiful blanket you will crochet!

You can read all about the basics of Mosaic Crochet in the accompanying document Mosaic Crochet, The Basics. It explains the following subjects:

Mosaic crochet
The stitches
Reading the pattern
Three solutions for the ends
Attaching the double border
Easy first row
Color use
Check it out for all your questions!

Pattern
The pattern includes a chart (with X’s for where your double crochets should go) as well as a completely written out pattern.

Size
The blanket measures, including the double border, 130 x 175 centimeters / 51 inches x 69 inches.

Yarn stats
Total blanket, with the double border: 1.730 grams / 61 ounces: 741 grams /26 ounces of color A and 989 grams / 35 ounces of color B.
For the blanket itself you need a 4 mm/G/6 hook, for the border you will need a hook one size smaller too.

My blankets
For the Fall version I used black for my color A and 14 other colors for my color B, all Stylecraft Special DK.
For the Summer version is used a deep grey for my color A and 14 other colors for my color B, all Stylecraft Special DK.
You can find the work sheets for where to place which colors for each version in the pattern.

Yarn packs
Yarn kits for the colors I used in the blanket shown here are available at
Yarnplaza https://www.yarnplaza.com/kits/yarn-kits/let-it-glass-bla...
Wolplein https://www.wolplein.nl/pakketten/garenpakketten/let-it-g...
https://www.wollplatz.de/artikel/48143/let-it-glass-blank...