colors are too washed out and dont really give a striking effect.
could have worked with color balance to try and make the orchid more red as it is red and green not fuschia and green.
uninteresting title.
It looks like you used the flash which blowed the higlights. Try using something to bounce the light from the flash instead, like a white paper. Plus, not complementary.
2 - Don't mind the composition and, despite the somewhat harsh lighting, adds something, as complements the 'sheer' texture of the orchids petals. Ultimately though, I'm seeing purple and green, and a slightly unusual green at that, so doesn't meet the Challenge in my opinion.
An interesting composition. I think you've got good focus but the lighting is a little harsh. Maybe the use of a polarizer might have helped to bring out the colour and texture of the leaves.
Lighting is really harsh and I don't see any significant amounts of yellow or red, which according to the challenge details would be the complimentary colors to purple or green respectively.