Before you start colouring a marker picture, it's always good to make a rough colour sketch first in order to see if the colours you had in mind really fit together. Quite often the image looks really good in your head but once on paper, you'll find it's not always the case.
I know it's obvious but as a precaution: Don't draw on the outlines! Either trace the outlines roughly on another piece of paper or make a copy of them (it doesn't have to be a good one).
The first picture shows the colours how I imagined them but the orange flower in her hair is too obvious and the orb around her neck would take away her red eye colour...
So I decided to change the colours for a more balanced colour scheme. The 2nd image looks better, ne? :)