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What is HEX Color Code?
Definition
A HEX color code is a six-digit hexadecimal representation of a color, prefixed with #. Each pair of digits represents red, green, and blue intensity (0-255). For example, #FF0000 is pure red, #00FF00 is green, and #FFFFFF is white.
Why It Matters
HEX colors are the most common color format in web development, used in CSS, design tools, and brand guidelines. Shorthand notation (#FFF for #FFFFFF) and 8-digit HEX (#FF000080 for 50% opacity red) are widely supported in modern CSS.