You can just add light-colored latex paint, such as white, light gray, light yellow, etc., to make the color lighter.

1. First prepare the color pigments iron red, iron yellow and iron black.

2. Prepare iron red, iron yellow, and iron black pigments in a ratio of 2:2:6.

3. Finally, add light-colored latex paint to the horseshoe blue palette paint. The above is how to prepare the Horseshoe Blue palette paint.