what type of medium are we talking about? digital or traditional?
with digital, i always opt for soft brushes as well as messing around with the opacity. softer lines allow for blending, and opacity allows you to start at a light hue and then darken it to your preferences. also, as i get darker, my brushes get smaller-- work from general shading to fine details.
Digital. I use a bamboo tablet and the free program FireAlpaca.
Ah that sounds like it could work and I will have to test it out. Thank you, Amphirion!