99% sure Kate is Summer based on her eyes.
Winters - eyes tend to be a solid colour, Kates are blue with olive/brown around the iris
Springs - tend to have starburst patterns around their eyes, specks are small and defined, Kate has olive its softly randomly speckled but not in a starburst pattern
Autumns- have olive or brown which indicates warmth
Summers-have a petal like pattern, petals are softly edged and flow into another, this is most like Kates
I'd say brown summer maybe, or deep- she can rock deep pink for example.
She looks classy in the lighter colours, not pale and washed out. In the autumn colours she looks older, more serious, she can wear them as she has warmth but they are not her best.
Just a tuppence!