#21178E#21178E

#21178E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.181 H 273.5°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#21178E
RGB	rgb(33, 23, 142)
HSL	hsl(245, 72%, 32%)
HSV	hsv(245, 84%, 56%)
CMYK	cmyk(76.8%, 83.8%, 0%, 44.3%)
CIE-LAB	lab(19.59, 43.60, -62.45)
CIE-LCH	lch(19.59, 76.17, 304.92°)
OKLab	oklab(32.61% 0.0111 -0.1806)
OKLCH	oklch(32.61% 0.181 273.5)
XYZ	xyz(5.8145, 2.8885, 25.8370)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21178E #848E17

analogous

#17498E #21178E #5D178E

triadic

#21178E #8E2117 #178E21

tetradic

#21178E #8E1749 #848E17 #178E5D

square

#21178E #8E1749 #848E17 #178E5D

split-complementary

#21178E #8E5D17 #498E17

monochromatic

#090625 #150E59 #21178E #2D20C3 #4D3FE0

Accessibility & contrast

On white

13.31

#21178E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#21178E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21178E

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21178E	#FFFFFF	#000000	##FFFFFF
##21178E	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003591

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#003D54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #21178e;
/* rgb */ color: rgb(33, 23, 142);
/* oklch */ color: oklch(32.6% 0.181 273.5);

Tailwind

colors: {
  custom: {
    50: '#7158b0',
    500: '#21178e',
    950: '#000000',
  },
}

SCSS

$custom: #21178e;
$custom-light: #7158b0;
$custom-dark: #000000;

JSON

{
  "hex": "#21178e",
  "rgb": {
    "r": 33,
    "g": 23,
    "b": 142
  },
  "hsl": {
    "h": 245.042,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32614,
    "c": 0.18099,
    "h": 273.5
  },
  "luminance": 0.02889
}

Semantic roles & 50–950 ramp

primary

#21178E

secondary

#B6C040

accent

#EF39E0

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #21178E

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

Preview Lab → · Contrast checker → · Palette generator →