#21638B#21638B

#21638B is a mid, moderate cyan. Relative luminance 0.111; OKLCH L 47.8% C 0.092 H 239.7°. Best body text is #FFFFFF at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#21638B
RGB	rgb(33, 99, 139)
HSL	hsl(203, 62%, 34%)
HSV	hsv(203, 76%, 55%)
CMYK	cmyk(76.3%, 28.8%, 0%, 45.5%)
CIE-LAB	lab(39.77, -6.33, -28.02)
CIE-LCH	lch(39.77, 28.72, 257.27°)
OKLab	oklab(47.76% -0.0462 -0.0792)
OKLCH	oklch(47.76% 0.092 239.7)
XYZ	xyz(9.7474, 11.1100, 26.0518)
Luminance	0.1111 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21638B #8B4921

analogous

#218B7E #21638B #212E8B

triadic

#21638B #8B2163 #638B21

tetradic

#21638B #7E218B #8B4921 #2E8B21

square

#21638B #7E218B #8B4921 #2E8B21

split-complementary

#21638B #8B212E #8B7E21

monochromatic

#0A1D28 #15405A #21638B #2D86BC #51A3D6

Accessibility & contrast

On white

6.52

#21638B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#21638B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21638B

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21638B	#FFFFFF	#000000	##FFFFFF
##21638B	1.00	6.52	3.22	6.52
#FFFFFF	6.52	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50638D

Deuteranopia (green-blind)

#42598A

Tritanopia (blue-blind)

#006D71

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #21638b;
/* rgb */ color: rgb(33, 99, 139);
/* oklch */ color: oklch(47.8% 0.092 239.7);

Tailwind

colors: {
  custom: {
    50: '#6c8fad',
    500: '#21638b',
    950: '#000000',
  },
}

SCSS

$custom: #21638b;
$custom-light: #6c8fad;
$custom-dark: #000000;

JSON

{
  "hex": "#21638b",
  "rgb": {
    "r": 33,
    "g": 99,
    "b": 139
  },
  "hsl": {
    "h": 202.642,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.4776,
    "c": 0.09166,
    "h": 239.7
  },
  "luminance": 0.11111
}

Semantic roles & 50–950 ramp

primary

#21638B

secondary

#B9774F

accent

#8043E5

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#080C10

muted

#7A7D7F

Preview Lab

Preview with #21638B

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

Preview Lab → · Contrast checker → · Palette generator →