I think what you meant is blending of eye colors right ?
I dont't usually blend as well only white eyeshadow . Look weird in other colors so dont't usually dare to try them .
Well what you can do is buy those eyeshadow palettes . Where there's like 3-4 tones of colors in it and usually it's more easier as those colors in a palette I feel it's the safest to blend with , that is if you wanna play safe .