#113333

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

HEX
#113333
RGB
rgb(17, 51, 51)
HSL
hsl(180, 50%, 13%)
OKLCH
oklch(29.6% 0.039 195.3)
CMYK
67% 0% 0% 80%
Relative luminance Relative luminance: a color's brightness from 0 (black) to 1 (white). It is used to compute WCAG contrast.
0.0273
Hue Hue: the kind of a color (red, orange, yellow…). We group the hue wheel into 12 sectors.
Cyan
Nearest name Nearest name: the closest CSS standard color name to this color.
darkslategray

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 13.59:1 -103
Black text 1.55:1 0
As text
White background 13.59:1 100
Black background 1.55:1 0

Color harmonies

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

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 1.55:1 APCA (Lc) 0

As background (white text)

Ratio 13.59:1 APCA (Lc) -103

As text (white background)

Ratio 13.59:1 APCA (Lc) 100

As text (black background)

Ratio 1.55:1 APCA (Lc) 0