#21399D#21399D

#21399D is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.5% C 0.165 H 267.5°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#21399D
RGB	rgb(33, 57, 157)
HSL	hsl(228, 65%, 37%)
HSV	hsv(228, 79%, 62%)
CMYK	cmyk(79%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(28.60, 28.47, -56.85)
CIE-LCH	lch(28.60, 63.58, 296.60°)
OKLab	oklab(39.55% -0.0071 -0.1644)
OKLCH	oklch(39.55% 0.165 267.5)
XYZ	xyz(8.1740, 5.6830, 32.5579)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21399D #9D8521

analogous

#21779D #21399D #47219D

triadic

#21399D #9D2139 #399D21

tetradic

#21399D #9D2177 #9D8521 #219D47

square

#21399D #9D2177 #9D8521 #219D47

split-complementary

#21399D #9D4721 #779D21

monochromatic

#0C1438 #16276A #21399D #2C4BD0 #5C75DD

Accessibility & contrast

On white

9.83

#21399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#21399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21399D

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21399D	#FFFFFF	#000000	##FFFFFF
##21399D	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A0

Deuteranopia (green-blind)

#003E9B

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #21399d;
/* rgb */ color: rgb(33, 57, 157);
/* oklch */ color: oklch(39.5% 0.165 267.5);

Tailwind

colors: {
  custom: {
    50: '#716fbb',
    500: '#21399d',
    950: '#000000',
  },
}

SCSS

$custom: #21399d;
$custom-light: #716fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#21399d",
  "rgb": {
    "r": 33,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 228.387,
    "s": 65.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.39547,
    "c": 0.16459,
    "h": 267.5
  },
  "luminance": 0.05684
}

Semantic roles & 50–950 ramp

primary

#21399D

secondary

#C1AD59

accent

#C840E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #21399D

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

Preview Lab → · Contrast checker → · Palette generator →