#21178A#21178A

#21178A is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.176 H 274.0°. Best body text is #FFFFFF at 13.51:1 contrast (WCAG AA passes).

Color values

HEX	#21178A
RGB	rgb(33, 23, 138)
HSL	hsl(245, 71%, 32%)
HSV	hsv(245, 83%, 54%)
CMYK	cmyk(76.1%, 83.3%, 0%, 45.9%)
CIE-LAB	lab(19.10, 42.33, -60.77)
CIE-LCH	lch(19.10, 74.06, 304.86°)
OKLab	oklab(32.13% 0.0122 -0.1758)
OKLCH	oklch(32.13% 0.176 274)
XYZ	xyz(5.5195, 2.7705, 24.2837)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21178A #808A17

analogous

#17478A #21178A #5B178A

triadic

#21178A #8A2117 #178A21

tetradic

#21178A #8A1747 #808A17 #178A5B

square

#21178A #8A1747 #808A17 #178A5B

split-complementary

#21178A #8A5B17 #478A17

monochromatic

#080621 #140E56 #21178A #2E20BE #4B3DDF

Accessibility & contrast

On white

13.51

#21178A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#21178A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21178A

13.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21178A	#FFFFFF	#000000	##FFFFFF
##21178A	1.00	13.51	1.55	13.51
#FFFFFF	13.51	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338D

Deuteranopia (green-blind)

#002988

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #21178a;
/* rgb */ color: rgb(33, 23, 138);
/* oklch */ color: oklch(32.1% 0.176 274.0);

Tailwind

colors: {
  custom: {
    50: '#7058ad',
    500: '#21178a',
    950: '#000000',
  },
}

SCSS

$custom: #21178a;
$custom-light: #7058ad;
$custom-dark: #000000;

JSON

{
  "hex": "#21178a",
  "rgb": {
    "r": 33,
    "g": 23,
    "b": 138
  },
  "hsl": {
    "h": 245.217,
    "s": 71.429,
    "l": 31.569
  },
  "oklch": {
    "l": 0.32132,
    "c": 0.17618,
    "h": 274
  },
  "luminance": 0.02771
}

Semantic roles & 50–950 ramp

primary

#21178A

secondary

#B3BE3F

accent

#EE3ADE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #21178A

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

Preview Lab → · Contrast checker → · Palette generator →