#21518B#21518B

#21518B is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.3% C 0.109 H 255.0°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#21518B
RGB	rgb(33, 81, 139)
HSL	hsl(213, 62%, 34%)
HSV	hsv(213, 76%, 55%)
CMYK	cmyk(76.3%, 41.7%, 0%, 45.5%)
CIE-LAB	lab(34.13, 5.10, -36.92)
CIE-LCH	lch(34.13, 37.27, 277.87°)
OKLab	oklab(43.33% -0.0283 -0.1054)
OKLCH	oklch(43.33% 0.109 255)
XYZ	xyz(8.2281, 8.0713, 25.5454)
Luminance	0.0807 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21518B #8B5B21

analogous

#21868B #21518B #26218B

triadic

#21518B #8B2151 #518B21

tetradic

#21518B #8B2186 #8B5B21 #218B26

square

#21518B #8B2186 #8B5B21 #218B26

split-complementary

#21518B #8B2621 #868B21

monochromatic

#0A1728 #15345A #21518B #2D6EBC #518DD6

Accessibility & contrast

On white

8.03

#21518B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#21518B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21518B

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21518B	#FFFFFF	#000000	##FFFFFF
##21518B	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#35568D

Deuteranopia (green-blind)

#244C8A

Tritanopia (blue-blind)

#005F67

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #21518b;
/* rgb */ color: rgb(33, 81, 139);
/* oklch */ color: oklch(43.3% 0.109 255.0);

Tailwind

colors: {
  custom: {
    50: '#6c81ad',
    500: '#21518b',
    950: '#000000',
  },
}

SCSS

$custom: #21518b;
$custom-light: #6c81ad;
$custom-dark: #000000;

JSON

{
  "hex": "#21518b",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 139
  },
  "hsl": {
    "h": 212.83,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.43332,
    "c": 0.10918,
    "h": 255
  },
  "luminance": 0.08072
}

Semantic roles & 50–950 ramp

primary

#21518B

secondary

#B9894F

accent

#9C43E5

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #21518B

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

Preview Lab → · Contrast checker → · Palette generator →