To harness unique color designs/transitions, you can use gradients. Like the greenish-blue transition on the embed, they can get adjusted with the βbackgroundβ variable.
They can also get incorporated wherever a color variable is present
how linear gradients work: linear-gradient(direction, color-stop1, color-stop2, ...)
Code Presets
copy + paste within the brackets (...)
Colors
Any standard color of the rainbow will reflect
red, blue, green, purple, yellow, orange,
You may also use additional colors by appending the color with either light or dark