Colour match challenge: fuschia flower

I was pretty happy with the colour I mixed for the flowers (alazarin crimson with a touch of ultramarine). I tried painting this on top of a layer of green paint but of course it was drab. So then there’s the question: how do you paint lots of small flowers first then green afterwards without painting over the flowers or leaving an obvious white space around them? Masking fluid would be too clumsy.

Fuschia colours
Fuschia sketches