Meaning of colours in htop

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http://unix.stackexchange.com – Given the option: [ ] Detailed CPU time (System/IO-Wait/Hard-IRQ/Soft-IRQ/Steal/Guest) In htop (Version 1.0.1) what are the meanings of the colours? In the following image, I'm seeing rather a lot of what I expect is IO-Wait, but where does one determine the meaning of the colours. Naturally this depends on the htop colour theme in use (default) and the terminal color scheme (solarized light here), but is there a reference? Note: This normally happens to my server right before it dies, so I thought I'd ask whilst I have some time waiting for the box to recover. (HowTos)