#21597B#21597B

#21597B is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.3% C 0.080 H 239.1°. Best body text is #FFFFFF at 7.56:1 contrast (WCAG AA passes).

Color values

HEX	#21597B
RGB	rgb(33, 89, 123)
HSL	hsl(203, 58%, 31%)
HSV	hsv(203, 73%, 48%)
CMYK	cmyk(73.2%, 27.6%, 0%, 51.8%)
CIE-LAB	lab(35.79, -6.18, -24.48)
CIE-LCH	lch(35.79, 25.25, 255.83°)
OKLab	oklab(44.35% -0.0413 -0.069)
OKLCH	oklch(44.35% 0.08 239.1)
XYZ	xyz(7.7733, 8.8973, 20.0427)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21597B #7B4321

analogous

#217B70 #21597B #212C7B

triadic

#21597B #7B2159 #597B21

tetradic

#21597B #70217B #7B4321 #2C7B21

square

#21597B #70217B #7B4321 #2C7B21

split-complementary

#21597B #7B212C #7B7021

monochromatic

#07131A #14364B #21597B #2E7CAB #489CCE

Accessibility & contrast

On white

7.56

#21597B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#21597B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21597B

7.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21597B	#FFFFFF	#000000	##FFFFFF
##21597B	1.00	7.56	2.78	7.56
#FFFFFF	7.56	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49597D

Deuteranopia (green-blind)

#3D507A

Tritanopia (blue-blind)

#006265

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #21597b;
/* rgb */ color: rgb(33, 89, 123);
/* oklch */ color: oklch(44.3% 0.080 239.1);

Tailwind

colors: {
  custom: {
    50: '#6987a1',
    500: '#21597b',
    950: '#000000',
  },
}

SCSS

$custom: #21597b;
$custom-light: #6987a1;
$custom-dark: #000000;

JSON

{
  "hex": "#21597b",
  "rgb": {
    "r": 33,
    "g": 89,
    "b": 123
  },
  "hsl": {
    "h": 202.667,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.44348,
    "c": 0.08045,
    "h": 239.1
  },
  "luminance": 0.08898
}

Semantic roles & 50–950 ramp

primary

#21597B

secondary

#AE704A

accent

#8147E1

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #21597B

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

Preview Lab → · Contrast checker → · Palette generator →