#21587B#21587B

#21587B is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.1% C 0.081 H 240.3°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#21587B
RGB	rgb(33, 88, 123)
HSL	hsl(203, 58%, 31%)
HSV	hsv(203, 73%, 48%)
CMYK	cmyk(73.2%, 28.5%, 0%, 51.8%)
CIE-LAB	lab(35.46, -5.56, -24.99)
CIE-LCH	lch(35.46, 25.60, 257.45°)
OKLab	oklab(44.09% -0.0402 -0.0705)
OKLCH	oklch(44.09% 0.081 240.3)
XYZ	xyz(7.6907, 8.7320, 20.0152)
Luminance	0.0873 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21587B #7B4421

analogous

#217B71 #21587B #212B7B

triadic

#21587B #7B2158 #587B21

tetradic

#21587B #71217B #7B4421 #2B7B21

square

#21587B #71217B #7B4421 #2B7B21

split-complementary

#21587B #7B212B #7B7121

monochromatic

#07131A #14354B #21587B #2E7BAB #489ACE

Accessibility & contrast

On white

7.65

#21587B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#21587B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21587B

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21587B	#FFFFFF	#000000	##FFFFFF
##21587B	1.00	7.65	2.75	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#48587D

Deuteranopia (green-blind)

#3B507A

Tritanopia (blue-blind)

#006164

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #21587b;
/* rgb */ color: rgb(33, 88, 123);
/* oklch */ color: oklch(44.1% 0.081 240.3);

Tailwind

colors: {
  custom: {
    50: '#6987a1',
    500: '#21587b',
    950: '#000000',
  },
}

SCSS

$custom: #21587b;
$custom-light: #6987a1;
$custom-dark: #000000;

JSON

{
  "hex": "#21587b",
  "rgb": {
    "r": 33,
    "g": 88,
    "b": 123
  },
  "hsl": {
    "h": 203.333,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.44092,
    "c": 0.08118,
    "h": 240.3
  },
  "luminance": 0.08733
}

Semantic roles & 50–950 ramp

primary

#21587B

secondary

#AE714A

accent

#8347E1

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #21587B

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

Preview Lab → · Contrast checker → · Palette generator →