how to shade/blend colours?

how do i shade/blend colours in toonboom studio?

is there a opacity tool i can use?

You can control the opacity of any color swatch in a color palette. Just select the color and double click on it to open the color editor dialogue and set the desired alpha level. To paint a color on top of another color be sure to go to the Tools menu and make sure Draw Top Layer is not selected.

Here are some additional resources that should help -JK

COLOR PALETTES

COLOR SWATCHES

CREATE A CUSTOM COLOR PALETTE

COLOR TRANSFORM EFFECT