Color series

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Colors: 1, 2, 3, 4 and 5 (left to right)

Optimizing the distance between the colors

Starting point
Adjacent colors in the color scale initially have approximately the same distance in the homogeneous color space and are roughly aligned in the same direction. On the right, you'll find three window schemes, one below the other, which you can use to assess the alignment and equal spacing yourself by observing them with your human eye and optimize them further.

Task I
In each window scheme, adjust the outer right color until it appears to you exactly the same as the left inner color. This also ensures that the left outer color appears to you exactly the same as the right inner color. Start with window scheme A. Click on the right outer color area to change the color. Once you are satisfied with Window scheme A, edit Window scheme B and finally Window scheme C.

Result
If you perceive a match between the outer right and inner left in all 3 window schemes, then the color scale at the top is also homogeneous. This means, it's evenly spaced and running in one direction.

Task II
Change the left outer color (Color 1) and the inner color (Color 2), and then continue with Task I. You can also change these color areas by clicking on them.

Remarks for task II
If colors 1 and 2 are far apart or near the edge of the color space, it's possible that the color space no longer contains suitable colors for colors 3 through 5. Furthermore, the window scheme works most reliably for closely spaced colors. For more widely spaced colors, it can still provide clues to a trained observer, but the colors will no longer appear completely identical.