Are there any rules of thumb or formulas for the different color shades when creating non-default buttons?
Default buttons have 4 states, Enabled, Focused, Pressed, and Disabled. These all tend to have built in default effects that are some shade of grey that are recognized by the user to mean their respective states(Like light grey tends to signify an unpressable button, etc). I'm interested in finding a tool or formula that I can apply to any color to achieve these distinctions.