Kiseilians show a wide variety of color combinations, You can add subtle gradients/nuances on basecoat, though these should be very light and not resemble markings!
All these techniques/effects are free to make for your markings!
You are allowed to add small nuances to markings, like these examples shown below. Drastic color changes in one marking can be done only with Gradient.
A marking's border fading into the basecoat color.
You are allowed to make a different saturated gradient in your marking, but remember to not make it blinding!
When a blended marking lays under all other markings can alterate the color of what lays above them. Only blended markings can alterate other markings, and only if they lay below all other markings.