Question 1

How do I convert RGBA to hex with alpha?

Accepted Answer

Convert RGB to hex normally. Alpha (0-1) converts to 00-FF hex and appends to the end.

Question 2

What is alpha transparency?

Accepted Answer

Alpha determines opacity. 0 = fully transparent, 1 (or FF in hex) = fully opaque.

Question 3

Which color format should I use?

Accepted Answer

Use HEX (#FF5733) for CSS, RGB(255,87,51) for code, CMYK for print. HSL is intuitive for adjusting brightness and saturation.

Question 4

Why do print colors look different from screen?

Accepted Answer

Screens emit RGB light; printers use CMYK ink. CMYK has a smaller color range (gamut), so bright screen colors may appear duller in print.

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