Create a new color from two RGB values

Question

Is it possible to combine two RGB values to create another color in livecode?

Example:

First color: (0,0,255) //BLUE

Second color: (255,0,0) //RED

In this case, I would like to store the result of the two colors into a variable.

Let's say, put "0, 0, 255" + "255, 0, 0" into CombinedColors

So you want to end up with `(255, 0, 255)`? And what about adding `(0, 0, 255)` twice? You can't go beyond 255 for a single channel in RGB. — Chrono, Dec 15 '14 at 08:30

score 1 · Answer 1 · answered Dec 15 '14 at 08:30

1

For combining 2 colours using RGB values, there are 2 ways.

If you need a lighter texture, the formulae you need to use is (r1, g1, b1) + (r2, g2, b2) = (min(r1+r2, 255), min(g1+g2, 255), min(b1+b2, 255))
If you need a slightly darker texture , use (r1, g1, b1) + (r2, g2, b2) = ((r1 + r2) / 2, (g1 + g2) / 2, (b1 + b2) / 2)

Or if you just want to avoid the hassle , use this simple online tools http://meyerweb.com/eric/tools/color-blend/

answered Dec 15 '14 at 08:30

saruftw

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Just wondering if I can add another color into the mixture. Is it still possible? – JunM Dec 15 '14 at 08:35
You can do anything with the new RGB . – saruftw Dec 15 '14 at 08:36
Thanks. I'll play around these steps. – JunM Dec 15 '14 at 08:38
The link to the "on-line tool" really doesn't make sense for a programming question. – Mark Dec 15 '14 at 08:52

score 1 · Accepted Answer · answered Dec 15 '14 at 09:02

It isn't exactly clear how you want to combine the colours. If you want to blend the colours, you might simply add them.

put 255,0,0 into myRed
put 0,0,255 into myBlue
put 0,10,100 into myGreen
repeat with x = 1 to 3
  put min(item x of myRed + item x of myBlue + item x of myGreen,255) into \
    item x of myNewColor
end repeat

The formula I'm using here doesn't make much sense. If you can more specific in your question, I'll be able to adjust my answer with a better formula.

You may also use weighted values:

put min(.333*item x of myRed + .333*item x of myBlue + .334*item \
        x of myGreen,255) into item x of myNewColor

You can adjust the weights to make the blend appear more natural. (This example is with 3 colours, to demonstrate the weights).

I think what I am looking is the `weighted values`. I added `round` to make it work: `put min(the round of(.333*item x of tCurColor + .333*item x of tColor),255) into \ item x of newColor`. Thanks for the help Mark. — JunM, Dec 15 '14 at 09:21

Create a new color from two RGB values

2 Answers2