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In a RGBA color value, what does A stand for?

4. In a RGBA color value, what does A stand for?

1. A specifies the opacity for a color
2. A specifies the Aqua color
3. A specifies the opacity Azure color
4. All of the above

Answer: A) A specifies the opacity for a color

Explanation:

RGBA color values are an extension of RGB color values with an alpha channel - which specifies the opacity for a color.

Example:

rgba(255, 0, 0, 0.2);