How do you color clear colored eyes on Gimp?

[Merchant]

Gimp ~image editor,
hxxp: gimp-win. sourceforge. net / stable. html

with gimp you open image,
create new layer,
select area with lasso tool, and fill with paint color,
or use brush and paint color,

then select mode for overlay options in layer toolbox,
overlay is one, you can use burn / dodge, addition and others to blend layers
hxxp: docs. gimp. org / en / gimp-concepts-layer-modes. html

Plugin Registry GIMP
hxxp: registry. gimp. org /
G'MIC : GREYC's Magic Image Converter
hxxp: registry. gimp. org / node / 13469
PSPI ~ Tor Lillqvist
hxxp: tml. pp. fi / gimp / pspi. html
UFRaw -for Gimp
hxxp: ufraw. sourceforge. net / index. html
. .