Question 1

How do I add opacity to a HEX color?

Accepted Answer

Add two digits at the end: #RRGGBBAA. FF = opaque, 00 = transparent.

Question 2

What is 50% opacity in hex?

Accepted Answer

50% = 80 in hex (128/256). So #FF000080 is 50% transparent red.

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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