#800000

maroon

Color values Color notations — HEX (hexadecimal), RGB (light primaries), HSL (hue/saturation/lightness), CMYK (print inks, approximate).

HEX
#800000
RGB
rgb(128, 0, 0)
HSL
hsl(0, 100%, 25%)
OKLCH
oklch(37.7% 0.155 29.2)
CMYK
0% 100% 100% 50%
Relative luminance Relative luminance: a color's brightness from 0 (black) to 1 (white). It is used to compute WCAG contrast.
0.0459
Hue Hue: the kind of a color (red, orange, yellow…). We group the hue wheel into 12 sectors.
Red
CSS color name
maroon

Contrast

Ratio Contrast ratio: the brightness difference between two colors, from 1:1 to 21:1. Higher is easier to read. APCA (Lc) APCA: a newer perceptual contrast measure from the WCAG 3 draft. Lc runs about 0–106; higher is easier to read. The sign shows polarity (dark text on light, or light on dark).
As background
White text 10.95:1 -97
Black text 1.92:1 11
As text
White background 10.95:1 93
Black background 1.92:1 -10

Color harmonies

Complementary Complementary: the opposite color on the wheel (180°). The two make each other pop.

Analogous Analogous: neighbors on the wheel (about ±15°). They make a cohesive palette.

Triadic Triadic: three colors evenly spaced 120° apart. Balanced and lively.

Split complementary Split complementary: the two colors beside the complement (180° ± 30°). Softer than a straight complement.

Tetradic Tetradic: four colors evenly spaced 90° apart. Good for multi-accent palettes.

Tone scale Tone scale: five steps that keep the hue but vary the lightness.

Shades & tints Shades & tints: lighter steps mixed toward white (tints) and darker steps mixed toward black (shades).

Impressions Impression: a tag for the mood a color evokes — warm, calm, vivid and so on.

Usage preview

As background (black text)

Ratio 1.92:1 APCA (Lc) 11

As background (white text)

Ratio 10.95:1 APCA (Lc) -97

As text (white background)

Ratio 10.95:1 APCA (Lc) 93

As text (black background)

Ratio 1.92:1 APCA (Lc) -10