Hex Colors in CSS: #RRGGBB, Short Hex, and Alpha
Decode CSS hex colors. Understand #RGB shorthand, #RRGGBBAA alpha notation, converting hex to rgb(), and picking accessible color values.
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Tags: developer-tools, hexadecimal, css
Hex Colors in CSS: Understanding #RRGGBB, Short Hex, and Alpha Hex color notation is the most common way colors are specified in CSS and design tools. is orange. is a dark navy. is white. Once you understand the structure, you can read and manipulate any hex color in your head — no color picker required. This article covers every hex color format CSS supports, how to convert between hex and RGB/HSL, and practical code for color manipulation. --- The Six-Digit Format: #RRGGBB A standard hex color in CSS is six hexadecimal digits representing three bytes: Each channel (R, G, B) is one byte: 8 bits, range 0–255, written as two hex digits (00 to FF). The full color space is 256³ = 16,777,216 possible colors. Reading hex colors: Quick heuristic for reading brightness: when all three channels…
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