aliceblue to yellowgreenCSS includes 140 named colours — from aliceblue to yellowgreen — that can be used anywhere a colour value is accepted. This tool finds the nearest named CSS colour to any arbitrary hex or RGB value using Delta-E colour distance calculation, useful when you want semantic colour names in code or when matching a hex code to a human-readable description.
CSS named colours were standardised from multiple sources: the original 16 VGA colours, X11 colour names (140 colours), and additions made in CSS3 including rebeccapurple (added in 2014 to honour Eric Meyer's daughter Rebecca). The full list includes basic names (red, blue, green) alongside poetic names (papayawhip, lavenderblush, cornsilk). They cover the full spectrum but are not evenly distributed — there are 39 shades of green and grey but only a handful of browns and oranges.
They are keyword values defined in the CSS Color specification. Each keyword maps to a fixed sRGB hex value — for example, tomato = #FF6347. They are case-insensitive and can be used anywhere a <color> value is accepted.
rebeccapurple?rebeccapurple (#663399) was added to CSS in 2014 in memory of Rebecca Alison Meyer, daughter of web standards author Eric A. Meyer, who passed away on her 6th birthday. It is the only CSS colour named after a person.
transparent is shorthand for rgba(0,0,0,0) — fully transparent black. It is used as an initial value for background-color and the from/to values in gradient transitions.
Yes. SVG attribute values and the Canvas 2D API accept CSS colour strings — including named colours, RGB, HEX, and HSL.
See also the Color Converter, Color Picker, and CMYK Converter.