#21378A#21378A

#21378A is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.141 H 267.6°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#21378A
RGB	rgb(33, 55, 138)
HSL	hsl(227, 61%, 34%)
HSV	hsv(227, 76%, 54%)
CMYK	cmyk(76.1%, 60.1%, 0%, 45.9%)
CIE-LAB	lab(26.42, 22.46, -48.74)
CIE-LCH	lch(26.42, 53.66, 294.74°)
OKLab	oklab(37.42% -0.0058 -0.1407)
OKLCH	oklch(37.42% 0.141 267.6)
XYZ	xyz(6.5792, 4.8900, 24.6369)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21378A #8A7421

analogous

#216B8A #21378A #3F218A

triadic

#21378A #8A2137 #378A21

tetradic

#21378A #8A216B #8A7421 #218A3F

square

#21378A #8A216B #8A7421 #218A3F

split-complementary

#21378A #8A3F21 #6B8A21

monochromatic

#091027 #152359 #21378A #2D4BBB #506CD5

Accessibility & contrast

On white

10.62

#21378A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#21378A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21378A

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21378A	#FFFFFF	#000000	##FFFFFF
##21378A	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448D

Deuteranopia (green-blind)

#003A88

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #21378a;
/* rgb */ color: rgb(33, 55, 138);
/* oklch */ color: oklch(37.4% 0.141 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d6dad',
    500: '#21378a',
    950: '#000000',
  },
}

SCSS

$custom: #21378a;
$custom-light: #6d6dad;
$custom-dark: #000000;

JSON

{
  "hex": "#21378a",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 138
  },
  "hsl": {
    "h": 227.429,
    "s": 61.404,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37418,
    "c": 0.14078,
    "h": 267.6
  },
  "luminance": 0.04891
}

Semantic roles & 50–950 ramp

primary

#21378A

secondary

#B9A24E

accent

#C343E5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #21378A

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

Preview Lab → · Contrast checker → · Palette generator →