#21337B#21337B

#21337B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.3% C 0.124 H 268.6°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#21337B
RGB	rgb(33, 51, 123)
HSL	hsl(228, 58%, 31%)
HSV	hsv(228, 73%, 48%)
CMYK	cmyk(73.2%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(24.07, 19.34, -43.16)
CIE-LCH	lch(24.07, 47.30, 294.13°)
OKLab	oklab(35.27% -0.0031 -0.1243)
OKLCH	oklch(35.27% 0.124 268.6)
XYZ	xyz(5.3849, 4.1205, 19.2466)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21337B #7B6921

analogous

#21607B #21337B #3C217B

triadic

#21337B #7B2133 #337B21

tetradic

#21337B #7B2160 #7B6921 #217B3C

square

#21337B #7B2160 #7B6921 #217B3C

split-complementary

#21337B #7B3C21 #607B21

monochromatic

#070B1A #141F4B #21337B #2E47AB #4863CE

Accessibility & contrast

On white

11.51

#21337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#21337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21337B

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21337B	#FFFFFF	#000000	##FFFFFF
##21337B	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7D

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #21337b;
/* rgb */ color: rgb(33, 51, 123);
/* oklch */ color: oklch(35.3% 0.124 268.6);

Tailwind

colors: {
  custom: {
    50: '#696aa2',
    500: '#21337b',
    950: '#000000',
  },
}

SCSS

$custom: #21337b;
$custom-light: #696aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#21337b",
  "rgb": {
    "r": 33,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 228,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.35269,
    "c": 0.12439,
    "h": 268.6
  },
  "luminance": 0.04121
}

Semantic roles & 50–950 ramp

primary

#21337B

secondary

#AE9A4A

accent

#C247E1

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #21337B

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

Preview Lab → · Contrast checker → · Palette generator →