#21378F#21378F

#21378F is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.9% C 0.148 H 267.8°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#21378F
RGB	rgb(33, 55, 143)
HSL	hsl(228, 63%, 35%)
HSV	hsv(228, 77%, 56%)
CMYK	cmyk(76.9%, 61.5%, 0%, 43.9%)
CIE-LAB	lab(26.84, 24.41, -51.14)
CIE-LCH	lch(26.84, 56.67, 295.52°)
OKLab	oklab(37.87% -0.0057 -0.1477)
OKLCH	oklch(37.87% 0.148 267.8)
XYZ	xyz(6.9496, 5.0381, 26.5875)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21378F #8F7921

analogous

#216E8F #21378F #42218F

triadic

#21378F #8F2137 #378F21

tetradic

#21378F #8F216E #8F7921 #218F42

square

#21378F #8F216E #8F7921 #218F42

split-complementary

#21378F #8F4221 #6E8F21

monochromatic

#0A112C #16245D #21378F #2C4AC1 #536ED7

Accessibility & contrast

On white

10.46

#21378F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#21378F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21378F

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21378F	#FFFFFF	#000000	##FFFFFF
##21378F	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004592

Deuteranopia (green-blind)

#003A8D

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #21378f;
/* rgb */ color: rgb(33, 55, 143);
/* oklch */ color: oklch(37.9% 0.148 267.8);

Tailwind

colors: {
  custom: {
    50: '#6e6db1',
    500: '#21378f',
    950: '#000000',
  },
}

SCSS

$custom: #21378f;
$custom-light: #6e6db1;
$custom-dark: #000000;

JSON

{
  "hex": "#21378f",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 143
  },
  "hsl": {
    "h": 228,
    "s": 62.5,
    "l": 34.51
  },
  "oklch": {
    "l": 0.37866,
    "c": 0.14783,
    "h": 267.8
  },
  "luminance": 0.05039
}

Semantic roles & 50–950 ramp

primary

#21378F

secondary

#BBA651

accent

#C542E6

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #21378F

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

Preview Lab → · Contrast checker → · Palette generator →