#21378D#21378D

#21378D is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.145 H 267.7°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#21378D
RGB	rgb(33, 55, 141)
HSL	hsl(228, 62%, 34%)
HSV	hsv(228, 77%, 55%)
CMYK	cmyk(76.6%, 61%, 0%, 44.7%)
CIE-LAB	lab(26.67, 23.63, -50.18)
CIE-LCH	lch(26.67, 55.47, 295.21°)
OKLab	oklab(37.69% -0.0057 -0.1449)
OKLCH	oklch(37.69% 0.145 267.7)
XYZ	xyz(6.7994, 4.9781, 25.7967)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21378D #8D7721

analogous

#216D8D #21378D #41218D

triadic

#21378D #8D2137 #378D21

tetradic

#21378D #8D216D #8D7721 #218D41

square

#21378D #8D216D #8D7721 #218D41

split-complementary

#21378D #8D4121 #6D8D21

monochromatic

#0A102A #15245B #21378D #2D4ABF #526DD6

Accessibility & contrast

On white

10.52

#21378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#21378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21378D

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21378D	#FFFFFF	#000000	##FFFFFF
##21378D	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#003A8B

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #21378d;
/* rgb */ color: rgb(33, 55, 141);
/* oklch */ color: oklch(37.7% 0.145 267.7);

Tailwind

colors: {
  custom: {
    50: '#6d6daf',
    500: '#21378d',
    950: '#000000',
  },
}

SCSS

$custom: #21378d;
$custom-light: #6d6daf;
$custom-dark: #000000;

JSON

{
  "hex": "#21378d",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 227.778,
    "s": 62.069,
    "l": 34.118
  },
  "oklch": {
    "l": 0.37686,
    "c": 0.14502,
    "h": 267.7
  },
  "luminance": 0.04979
}

Semantic roles & 50–950 ramp

primary

#21378D

secondary

#BAA450

accent

#C443E5

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #21378D

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

Preview Lab → · Contrast checker → · Palette generator →