#21638C#21638C

#21638C is a mid, moderate cyan. Relative luminance 0.111; OKLCH L 47.8% C 0.093 H 240.4°. Best body text is #FFFFFF at 6.51:1 contrast (WCAG AA passes).

Color values

HEX	#21638C
RGB	rgb(33, 99, 140)
HSL	hsl(203, 62%, 34%)
HSV	hsv(203, 76%, 55%)
CMYK	cmyk(76.4%, 29.3%, 0%, 45.1%)
CIE-LAB	lab(39.81, -5.95, -28.54)
CIE-LCH	lch(39.81, 29.16, 258.22°)
OKLab	oklab(47.82% -0.0459 -0.0807)
OKLCH	oklch(47.82% 0.093 240.4)
XYZ	xyz(9.8208, 11.1393, 26.4384)
Luminance	0.1114 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21638C #8C4A21

analogous

#218C80 #21638C #212D8C

triadic

#21638C #8C2163 #638C21

tetradic

#21638C #80218C #8C4A21 #2D8C21

square

#21638C #80218C #8C4A21 #2D8C21

split-complementary

#21638C #8C212D #8C8021

monochromatic

#0A1D29 #15405A #21638C #2D86BE #51A3D6

Accessibility & contrast

On white

6.51

#21638C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#21638C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21638C

6.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21638C	#FFFFFF	#000000	##FFFFFF
##21638C	1.00	6.51	3.23	6.51
#FFFFFF	6.51	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50638E

Deuteranopia (green-blind)

#41598B

Tritanopia (blue-blind)

#006D71

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #21638c;
/* rgb */ color: rgb(33, 99, 140);
/* oklch */ color: oklch(47.8% 0.093 240.4);

Tailwind

colors: {
  custom: {
    50: '#6c8fae',
    500: '#21638c',
    950: '#000000',
  },
}

SCSS

$custom: #21638c;
$custom-light: #6c8fae;
$custom-dark: #000000;

JSON

{
  "hex": "#21638c",
  "rgb": {
    "r": 33,
    "g": 99,
    "b": 140
  },
  "hsl": {
    "h": 202.991,
    "s": 61.85,
    "l": 33.922
  },
  "oklch": {
    "l": 0.47815,
    "c": 0.09281,
    "h": 240.4
  },
  "luminance": 0.1114
}

Semantic roles & 50–950 ramp

primary

#21638C

secondary

#B9784F

accent

#8143E5

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#080C10

muted

#7A7D7F

Preview Lab

Preview with #21638C

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

Preview Lab → · Contrast checker → · Palette generator →