Bleach would just harm the wood and you'd get no color change.

You can repaint with a faux wood grain look. There are tutorials on YouTube on different ways to do it, from using wood grain rocker/roller/comb tools, to simply using different paint colors layered with directional brush strokes. It isn't that hard, but you'd need a little patience, space, and dry time. If that seems like a lot, you could always cover with a lighter toned wood-patterned adhesive laminate (contact paper/shelf liner).