i need help with the coloring

[copper cargo]

So i tried doing shadow’s with gogeta hair but it was very dark idk if to make it all brown then add black shade to some sort of change the hair color to make it look better any tips

[scenic gust]

You can add more brown to turn the yellow into a highlight

U can still add black to be ur dark darks

[muted ferry]

Ermmmm his chest is hecka small