Hello,
I have some questions about colour.
#1. In Photoshop, RGB mode, if I turn the mode into "filter", and set the background as white, then I paint red, or green or blue on a new layer each, I cannot see any other colours, except the white of the background layer.
I understood this is because the RGB of white is 255, 255, 255, which is strongest, so even if I add red, 255, 0, 0, the total value doesn't change. Is this understanding of mine correct?
#2. Then in a complete dark room without any light, the wall is white. Then I turn a blue light on the white wall, why does the spot of the wall covered by the blue light appears blue? Is this because the white of the wall is not the colour of light but the color of painting or the colour of the object? I think this is different from theory of #1.
White of the color will not absorb any colour of light, so the blue of light willl reflect to the eyes. Correct?
#3. I am watching a tutorial, the instructor says complementary colours will not effect on each other. For example, if the wall is painted in cyan, and the light is red. If I cast the red light on the wall, the wall is still cyan.
I am not very clear about what he is talking about. Does "complement colours will not effect on each other" apply to both of colours of light and the colours of paint?
I think it refers to one is an object, and other is a light of certain colour. Correct? It cannot be both the colours of two lights, or two colours of objects. Is this correct?
#4. Can you explain why completementary colours will not effect on each other? (In this case, I refer to #3 above)
For example, red RGB: 255, 0, 0; Cyan 0, 255, 255
If red and cyan are mingled together, why is it not white, 255, 255, 255?
Thank you very much!
I have some questions about colour.
#1. In Photoshop, RGB mode, if I turn the mode into "filter", and set the background as white, then I paint red, or green or blue on a new layer each, I cannot see any other colours, except the white of the background layer.
I understood this is because the RGB of white is 255, 255, 255, which is strongest, so even if I add red, 255, 0, 0, the total value doesn't change. Is this understanding of mine correct?
#2. Then in a complete dark room without any light, the wall is white. Then I turn a blue light on the white wall, why does the spot of the wall covered by the blue light appears blue? Is this because the white of the wall is not the colour of light but the color of painting or the colour of the object? I think this is different from theory of #1.
White of the color will not absorb any colour of light, so the blue of light willl reflect to the eyes. Correct?
#3. I am watching a tutorial, the instructor says complementary colours will not effect on each other. For example, if the wall is painted in cyan, and the light is red. If I cast the red light on the wall, the wall is still cyan.
I am not very clear about what he is talking about. Does "complement colours will not effect on each other" apply to both of colours of light and the colours of paint?
I think it refers to one is an object, and other is a light of certain colour. Correct? It cannot be both the colours of two lights, or two colours of objects. Is this correct?
#4. Can you explain why completementary colours will not effect on each other? (In this case, I refer to #3 above)
For example, red RGB: 255, 0, 0; Cyan 0, 255, 255
If red and cyan are mingled together, why is it not white, 255, 255, 255?
Thank you very much!
