#21639B#21639B

#21639B is a mid, moderate cyan. Relative luminance 0.116; OKLCH L 48.7% C 0.111 H 248.3°. Best body text is #FFFFFF at 6.32:1 contrast (WCAG AA passes).

Color values

HEX	#21639B
RGB	rgb(33, 99, 155)
HSL	hsl(208, 65%, 37%)
HSV	hsv(208, 79%, 61%)
CMYK	cmyk(78.7%, 36.1%, 0%, 39.2%)
CIE-LAB	lab(40.59, -0.25, -36.31)
CIE-LCH	lch(40.59, 36.31, 269.61°)
OKLab	oklab(48.69% -0.0412 -0.1033)
OKLCH	oklch(48.69% 0.111 248.3)
XYZ	xyz(11.0032, 11.6123, 32.6655)
Luminance	0.1161 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21639B #9B5921

analogous

#219B96 #21639B #21269B

triadic

#21639B #9B2163 #639B21

tetradic

#21639B #96219B #9B5921 #269B21

square

#21639B #96219B #9B5921 #269B21

split-complementary

#21639B #9B2126 #9B9621

monochromatic

#0C2336 #164369 #21639B #2C83CD #5AA1DC

Accessibility & contrast

On white

6.32

#21639B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#21639B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21639B

6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21639B	#FFFFFF	#000000	##FFFFFF
##21639B	1.00	6.32	3.32	6.32
#FFFFFF	6.32	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49669D

Deuteranopia (green-blind)

#375B9A

Tritanopia (blue-blind)

#007077

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #21639b;
/* rgb */ color: rgb(33, 99, 155);
/* oklch */ color: oklch(48.7% 0.111 248.3);

Tailwind

colors: {
  custom: {
    50: '#6f8fb9',
    500: '#21639b',
    950: '#000000',
  },
}

SCSS

$custom: #21639b;
$custom-light: #6f8fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#21639b",
  "rgb": {
    "r": 33,
    "g": 99,
    "b": 155
  },
  "hsl": {
    "h": 207.541,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.48685,
    "c": 0.11126,
    "h": 248.3
  },
  "luminance": 0.11614
}

Semantic roles & 50–950 ramp

primary

#21639B

secondary

#C08858

accent

#8D40E8

background

#F7F8FB

surface

#EDF0F6

border

#C8CBD0

text

#080C11

muted

#7B7D80

Preview Lab

Preview with #21639B

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

Preview Lab → · Contrast checker → · Palette generator →