#21337E#21337E

#21337E is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.129 H 268.7°. Best body text is #FFFFFF at 11.42:1 contrast (WCAG AA passes).

Color values

HEX	#21337E
RGB	rgb(33, 51, 126)
HSL	hsl(228, 58%, 31%)
HSV	hsv(228, 74%, 49%)
CMYK	cmyk(73.8%, 59.5%, 0%, 50.6%)
CIE-LAB	lab(24.31, 20.52, -44.66)
CIE-LCH	lch(24.31, 49.15, 294.68°)
OKLab	oklab(35.53% -0.0029 -0.1287)
OKLCH	oklch(35.53% 0.129 268.7)
XYZ	xyz(5.5756, 4.1968, 20.2508)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21337E #7E6C21

analogous

#21617E #21337E #3D217E

triadic

#21337E #7E2133 #337E21

tetradic

#21337E #7E2161 #7E6C21 #217E3D

square

#21337E #7E2161 #7E6C21 #217E3D

split-complementary

#21337E #7E3D21 #617E21

monochromatic

#080C1D #141F4E #21337E #2E47AE #4A64D0

Accessibility & contrast

On white

11.42

#21337E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#21337E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21337E

11.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21337E	#FFFFFF	#000000	##FFFFFF
##21337E	1.00	11.42	1.84	11.42
#FFFFFF	11.42	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E81

Deuteranopia (green-blind)

#00367D

Tritanopia (blue-blind)

#004653

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #21337e;
/* rgb */ color: rgb(33, 51, 126);
/* oklch */ color: oklch(35.5% 0.129 268.7);

Tailwind

colors: {
  custom: {
    50: '#6a6aa4',
    500: '#21337e',
    950: '#000000',
  },
}

SCSS

$custom: #21337e;
$custom-light: #6a6aa4;
$custom-dark: #000000;

JSON

{
  "hex": "#21337e",
  "rgb": {
    "r": 33,
    "g": 51,
    "b": 126
  },
  "hsl": {
    "h": 228.387,
    "s": 58.491,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35531,
    "c": 0.12877,
    "h": 268.7
  },
  "luminance": 0.04197
}

Semantic roles & 50–950 ramp

primary

#21337E

secondary

#B19D4A

accent

#C446E2

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #21337E

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →