How can I generate the opposite color according to current color?

Question

I\'m trying to create a color opposite of current color. I mean if current color is black, then I need to generate white.

Actually I have a text

Answer 1

In my understanding of your question, by opposite color you mean inverted color.

InvertedColorComponent = 0xFF - ColorComponent

So for the color red (#FF0000) this means: R = 0xFF or 255 G = 0x00 or 0 B = 0x00 or 0

inverted color red (#00FFFF) is:

R = 0xFF - 0xFF = 0x00 or 255 - 255 = 0
G = 0xFF - 0x00 = 0xFF or 255 - 0 = 255
B = 0xFF - 0x00 = 0xFF or 255 - 0 = 255

Another examples:

Black (#000000) becomes White (#FFFFFF).

Orange (#FFA500) becomes #005AFF