#21178B#21178B

#21178B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.3% C 0.177 H 273.8°. Best body text is #FFFFFF at 13.46:1 contrast (WCAG AA passes).

Color values

HEX	#21178B
RGB	rgb(33, 23, 139)
HSL	hsl(245, 72%, 32%)
HSV	hsv(245, 83%, 55%)
CMYK	cmyk(76.3%, 83.5%, 0%, 45.5%)
CIE-LAB	lab(19.22, 42.65, -61.19)
CIE-LCH	lch(19.22, 74.59, 304.87°)
OKLab	oklab(32.25% 0.0119 -0.177)
OKLCH	oklch(32.25% 0.177 273.8)
XYZ	xyz(5.5922, 2.7996, 24.6668)
Luminance	0.0280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21178B #818B17

analogous

#17478B #21178B #5B178B

triadic

#21178B #8B2117 #178B21

tetradic

#21178B #8B1747 #818B17 #178B5B

square

#21178B #8B1747 #818B17 #178B5B

split-complementary

#21178B #8B5B17 #478B17

monochromatic

#080622 #150E56 #21178B #2D20C0 #4B3DDF

Accessibility & contrast

On white

13.46

#21178B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#21178B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21178B

13.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21178B	#FFFFFF	#000000	##FFFFFF
##21178B	1.00	13.46	1.56	13.46
#FFFFFF	13.46	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #21178b;
/* rgb */ color: rgb(33, 23, 139);
/* oklch */ color: oklch(32.3% 0.177 273.8);

Tailwind

colors: {
  custom: {
    50: '#7058ae',
    500: '#21178b',
    950: '#000000',
  },
}

SCSS

$custom: #21178b;
$custom-light: #7058ae;
$custom-dark: #000000;

JSON

{
  "hex": "#21178b",
  "rgb": {
    "r": 33,
    "g": 23,
    "b": 139
  },
  "hsl": {
    "h": 245.172,
    "s": 71.605,
    "l": 31.765
  },
  "oklch": {
    "l": 0.32252,
    "c": 0.17739,
    "h": 273.8
  },
  "luminance": 0.028
}

Semantic roles & 50–950 ramp

primary

#21178B

secondary

#B4BF3F

accent

#EE39DF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090310

muted

#7B787F

Preview Lab

Preview with #21178B

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

Preview Lab → · Contrast checker → · Palette generator →