#21578D#21578D

#21578D is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.105 H 251.4°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#21578D
RGB	rgb(33, 87, 141)
HSL	hsl(210, 62%, 34%)
HSV	hsv(210, 77%, 55%)
CMYK	cmyk(76.6%, 38.3%, 0%, 44.7%)
CIE-LAB	lab(36.10, 1.97, -35.00)
CIE-LCH	lch(36.10, 35.06, 273.22°)
OKLab	oklab(44.91% -0.0336 -0.0997)
OKLCH	oklch(44.91% 0.105 251.4)
XYZ	xyz(8.8413, 9.0618, 26.4773)
Luminance	0.0906 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21578D #8D5721

analogous

#218D8D #21578D #21218D

triadic

#21578D #8D2157 #578D21

tetradic

#21578D #8D218D #8D5721 #218D21

square

#21578D #8D218D #8D5721 #218D21

split-complementary

#21578D #8D2121 #8D8D21

monochromatic

#0A1A2A #15385B #21578D #2D76BF #5294D6

Accessibility & contrast

On white

7.47

#21578D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#21578D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21578D

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21578D	#FFFFFF	#000000	##FFFFFF
##21578D	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8F

Deuteranopia (green-blind)

#2E508C

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #21578d;
/* rgb */ color: rgb(33, 87, 141);
/* oklch */ color: oklch(44.9% 0.105 251.4);

Tailwind

colors: {
  custom: {
    50: '#6c86ae',
    500: '#21578d',
    950: '#000000',
  },
}

SCSS

$custom: #21578d;
$custom-light: #6c86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#21578d",
  "rgb": {
    "r": 33,
    "g": 87,
    "b": 141
  },
  "hsl": {
    "h": 210,
    "s": 62.069,
    "l": 34.118
  },
  "oklch": {
    "l": 0.44909,
    "c": 0.10522,
    "h": 251.4
  },
  "luminance": 0.09063
}

Semantic roles & 50–950 ramp

primary

#21578D

secondary

#BA8550

accent

#9443E5

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #21578D

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

Preview Lab → · Contrast checker → · Palette generator →