#10178D#10178D

#10178D is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.6% C 0.184 H 267.6°. Best body text is #FFFFFF at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#10178D
RGB	rgb(16, 23, 141)
HSL	hsl(237, 80%, 31%)
HSV	hsv(237, 89%, 55%)
CMYK	cmyk(88.7%, 83.7%, 0%, 44.7%)
CIE-LAB	lab(18.56, 42.35, -63.56)
CIE-LCH	lch(18.56, 76.38, 303.68°)
OKLab	oklab(31.62% -0.0077 -0.1841)
OKLCH	oklch(31.62% 0.184 267.6)
XYZ	xyz(5.3261, 2.6454, 25.4240)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10178D #8D8610

analogous

#10558D #10178D #47108D

triadic

#10178D #8D1017 #178D10

tetradic

#10178D #8D1055 #8D8610 #108D47

square

#10178D #8D1055 #8D8610 #108D47

split-complementary

#10178D #8D4710 #558D10

monochromatic

#04051F #0A0E56 #10178D #1620C4 #303AE7

Accessibility & contrast

On white

13.73

#10178D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#10178D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10178D

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10178D	#FFFFFF	#000000	##FFFFFF
##10178D	1.00	13.73	1.53	13.73
#FFFFFF	13.73	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003490

Deuteranopia (green-blind)

#00278B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #10178d;
/* rgb */ color: rgb(16, 23, 141);
/* oklch */ color: oklch(31.6% 0.184 267.6);

Tailwind

colors: {
  custom: {
    50: '#6c57b0',
    500: '#10178d',
    950: '#000000',
  },
}

SCSS

$custom: #10178d;
$custom-light: #6c57b0;
$custom-dark: #000000;

JSON

{
  "hex": "#10178d",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 141
  },
  "hsl": {
    "h": 236.64,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31619,
    "c": 0.18429,
    "h": 267.6
  },
  "luminance": 0.02646
}

Semantic roles & 50–950 ramp

primary

#10178D

secondary

#C2BA37

accent

#EB32F6

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080311

muted

#7B7880

Preview Lab

Preview with #10178D

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

Preview Lab → · Contrast checker → · Palette generator →