Relation between VIBGYOR and RGB

is there a formula or relation that converts VIBGYOR to RGB ? i mean, in terms of RGB we can
say colors vary uniformly from black(0,0,0)to white(255,255,255). is there a similar uniform
way in which colors range from Violet to Red
(in terms of RGB)? the idea is to give it in a
for loop from violet to red. Please help.
Suggestions are also appreciated if you dont
have a code for this.

Thank you.
Suresh Babu.

VIBGYOR is an arrangement of colors according to descending frequency, the RGB model does not map directly to the frequency relationship. The CIE model is closer to this, but instead of trying to convert colors to te CIE model, you can make a lookup table, say of 240 elements.

The first element in the LUT would be Violet(&HEE82EE), and then a gradient of 40 colors to element 40 which would be Indigo(&h82004B). The 80th element would be Green, and so on up to Red. Orange is &hFFA5&

Now you can use this LUT whenever necessary.