#21739B#21739B

#21739B is a mid, moderate cyan. Relative luminance 0.150; OKLCH L 52.6% C 0.098 H 234.8°. Best body text is #FFFFFF at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#21739B
RGB	rgb(33, 115, 155)
HSL	hsl(200, 65%, 37%)
HSV	hsv(200, 79%, 61%)
CMYK	cmyk(78.7%, 25.8%, 0%, 39.2%)
CIE-LAB	lab(45.57, -9.94, -28.50)
CIE-LCH	lch(45.57, 30.18, 250.77°)
OKLab	oklab(52.62% -0.0566 -0.0804)
OKLCH	oklch(52.62% 0.098 234.8)
XYZ	xyz(12.6720, 14.9498, 33.2217)
Luminance	0.1495 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21739B #9B4921

analogous

#219B86 #21739B #21369B

triadic

#21739B #9B2173 #739B21

tetradic

#21739B #86219B #9B4921 #369B21

square

#21739B #86219B #9B4921 #369B21

split-complementary

#21739B #9B2136 #9B8621

monochromatic

#0C2836 #164E69 #21739B #2C98CD #5AB1DC

Accessibility & contrast

On white

5.26

#21739B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.99

#21739B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21739B

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21739B	#FFFFFF	#000000	##FFFFFF
##21739B	1.00	5.26	3.99	5.26
#FFFFFF	5.26	1.00	21.00	1.00
#000000	3.99	21.00	1.00	21.00
##FFFFFF	5.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F729D

Deuteranopia (green-blind)

#4F679A

Tritanopia (blue-blind)

#007D81

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #21739b;
/* rgb */ color: rgb(33, 115, 155);
/* oklch */ color: oklch(52.6% 0.098 234.8);

Tailwind

colors: {
  custom: {
    50: '#709bb8',
    500: '#21739b',
    950: '#000000',
  },
}

SCSS

$custom: #21739b;
$custom-light: #709bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#21739b",
  "rgb": {
    "r": 33,
    "g": 115,
    "b": 155
  },
  "hsl": {
    "h": 199.672,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.5262,
    "c": 0.09832,
    "h": 234.8
  },
  "luminance": 0.14951
}

Semantic roles & 50–950 ramp

primary

#21739B

secondary

#C07A58

accent

#7740E8

background

#F7F9FB

surface

#EDF2F6

border

#C8CCD0

text

#090E11

muted

#7B7E80

Preview Lab

Preview with #21739B

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

Preview Lab → · Contrast checker → · Palette generator →