A cool effect you can add to your images. Depending on the strength, you can get some interesting results. Trained on 149 images with different colors.

For a stronger effect use: glowing, neon,

For a particular color use:

Yellow: (yellow theme:1.2)

Violet: (violet theme:1.2)

White: (white theme:1.2)

Dark: (dark theme:1.2)

Green: (green theme:1.2)

Red: (red theme:1.2)

Blue: (blue theme:1.2)

Gradient: (gradient theme:1.2)

To get something "darker" use: (dark yourcolor theme:1.2)

You can also mix colors like: (dark red and blue theme:1.2)

or

(dark [red|blue|green] theme:1.2). This will on each step go from red (step 1) blue (step 2) green (step 3) and repeat.

Try experimenting :D