OP, do YOU like the colour on yourself? If so, wear it, enjoy it, and find some good accessories to flatter your colouring. I'm freckly fair with a slight pink undertone and wear a lot of green. With that yellow-green I'd wear my silk chiffon scarf in pink and deep rose with olive leaves; my Liberty twill scarf in mint, turquoise and caramel; my glass-bead necklace in predominantly red with pale blue, forest green and silver beads. You've picked a good neutral, so have fun with it and ignore your mum's strictures.