For your information, I fixed a bug with the rating indicator that caused low ratings (indicated in blue tones) to be indicated in too bright a colour, often causing a bright white spot on the low region even when relatively few ratings actually occur on that region.
It was a miscalculation in the mixture of HSV & YUV colorspaces aiming to calculate a realistic brightness value representing the rating's strength in that particular region.
Here's how the colours work.
On X axis, is the hue. It indicates the value of the rating. 0 = on the left side, 10 = on the right side.
On Y axis, is the brightness. It indicates the popularity of that particular rating option. Top = Nobody has voted that option, bottom = most people have voted that option.
Here's how the colours used to be indicated, when it was buggy.
![](http://bisqwit.iki.fi/kala/snap/hsvbright_bug.png)
Here's how they are indicated after the bug was fixed.
![](http://bisqwit.iki.fi/kala/snap/hsvbright.png)
Here's how they would be indicated if the relative brightness differences of red, green and blue were
not observed in the calculation (i.e. a full blue would be treated as equally bright as a full green):
![](http://bisqwit.iki.fi/kala/snap/hsvbright2.png)
I'm kind of torn how to actually go ahead with the colours :I