Katie Holmes in colour

I've really put a lot of work into this colour drawing of Katie. It so challenging to me using colours and I never seem to get them just right. But I think I am getting closer, so got to keep practising, right? It's made with my regular colour pencils for kids on regular sketch paper(non smooth). This time I put all my orange/yellow pencils away cause I think that has been my biggest mistakes earlier. Yet my lovely scanner has made her a little yellowish still, but on the drawing the colours are more light brown. Anyway yeah any advice and comments are more than welcome.
Size; 30x42 cm.