I've been scrubbing over the color picker in the LabVIEW Icon Editor and have noticed something. When you use the color picker in the Icon Editor, even though your monitor displays a ton of colors, LabVIEW restricts what you can pick.
Along the "greys" bar at the top, there are actually only 11 unique RGB values you're allowed to get at. They are:
Grey RGBs
(0,0,0)
(17,17,17)
(51,51,51)
(68,68,68)
(102,102,102)
(119,119,119)
(153,153,153)
(170,170,170)
(204,204,204)
(221,221,221)
(255,255,255)
Likewise, in the "muted" & "saturated" areas (stealing my terminology from Christina), my manual scrubbing so far indicates that you're limited to any combination of the following hues:
Saturated & Muted RGBs
R: 0/51/102/153/204/255
G: 0/51/102/153/204/255
B: 0/51/102/153/204/255
If we calculate all the possible RGB colors we can select from these, we get 63 = 216. Adding in the grey shades that weren't already duplicated in that calculation, we get a total color palette of 216 + 5 = 221 valid LabVIEW VI Icon colors.
This raises a question: Are these all the colors we can use in LabVIEW VI icons, or are there 34 more that I'm missing? The motivation for the question is that I'm trying to dither some images for use in LabVIEW icons using an external tool, and I want to do it right (LabVIEW's color substition is rather lacking).
EDIT: I generated a colormap of all 221 colors described above, as a PNG. Each color is a block (and black is duplicated a few times), but it's all in there. Just in case anyone besides me finds it useful:
1x1:
3x3: