#21178C#21178C

#21178C is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.179 H 273.7°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#21178C
RGB	rgb(33, 23, 140)
HSL	hsl(245, 72%, 32%)
HSV	hsv(245, 84%, 55%)
CMYK	cmyk(76.4%, 83.6%, 0%, 45.1%)
CIE-LAB	lab(19.35, 42.96, -61.61)
CIE-LCH	lch(19.35, 75.12, 304.89°)
OKLab	oklab(32.37% 0.0116 -0.1782)
OKLCH	oklch(32.37% 0.179 273.7)
XYZ	xyz(5.6656, 2.8290, 25.0533)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21178C #828C17

analogous

#17488C #21178C #5C178C

triadic

#21178C #8C2117 #178C21

tetradic

#21178C #8C1748 #828C17 #178C5C

square

#21178C #8C1748 #828C17 #178C5C

split-complementary

#21178C #8C5C17 #488C17

monochromatic

#080623 #150E57 #21178C #2D20C1 #4C3EDF

Accessibility & contrast

On white

13.41

#21178C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#21178C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21178C

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21178C	#FFFFFF	#000000	##FFFFFF
##21178C	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348F

Deuteranopia (green-blind)

#00298A

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #21178c;
/* rgb */ color: rgb(33, 23, 140);
/* oklch */ color: oklch(32.4% 0.179 273.7);

Tailwind

colors: {
  custom: {
    50: '#7058af',
    500: '#21178c',
    950: '#000000',
  },
}

SCSS

$custom: #21178c;
$custom-light: #7058af;
$custom-dark: #000000;

JSON

{
  "hex": "#21178c",
  "rgb": {
    "r": 33,
    "g": 23,
    "b": 140
  },
  "hsl": {
    "h": 245.128,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32373,
    "c": 0.17859,
    "h": 273.7
  },
  "luminance": 0.0283
}

Semantic roles & 50–950 ramp

primary

#21178C

secondary

#B4BF3F

accent

#EF39DF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #21178C

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

Preview Lab → · Contrast checker → · Palette generator →