I'm actually having trouble with the contrast as well. But I don't think the colours them selves are absolutely unusable together, I think the combination of t

I'm actually having trouble with the contrast as well. But I don't think the colours them selves are absolutely unusable together, I think the combination of the colours and the font weight/size is really the issue (although that could be less the case on a retina screen). It also doesn't help that I'm viewing it on a older monitor with poor colour control (particularly with contrast).