How do you color clear colored eyes on Gimp?

[TheDeer]

select the iris were its clear and soleckt a cirle aria around it but make it a fuzzy boarder otherwize the sharp edges will create a forced look, and in the tools u can edid saturations and colores, but theres also anuther to ad hue of colors use a mix of these to keep hilights and shadows, u can also use this to change colore of hair, cloths, eyes and all look fairly natural