#10188D#10188D

#10188D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.7% C 0.183 H 267.5°. Best body text is #FFFFFF at 13.66:1 contrast (WCAG AA passes).

Color values

HEX	#10188D
RGB	rgb(16, 24, 141)
HSL	hsl(236, 80%, 31%)
HSV	hsv(236, 89%, 55%)
CMYK	cmyk(88.7%, 83%, 0%, 44.7%)
CIE-LAB	lab(18.74, 41.84, -63.27)
CIE-LCH	lch(18.74, 75.86, 303.48°)
OKLab	oklab(31.74% -0.0079 -0.1833)
OKLCH	oklch(31.74% 0.183 267.5)
XYZ	xyz(5.3464, 2.6858, 25.4308)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10188D #8D8510

analogous

#10568D #10188D #46108D

triadic

#10188D #8D1018 #188D10

tetradic

#10188D #8D1056 #8D8510 #108D46

square

#10188D #8D1056 #8D8510 #108D46

split-complementary

#10188D #8D4610 #568D10

monochromatic

#04051F #0A0F56 #10188D #1621C4 #303CE7

Accessibility & contrast

On white

13.66

#10188D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#10188D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10188D

13.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10188D	#FFFFFF	#000000	##FFFFFF
##10188D	1.00	13.66	1.54	13.66
#FFFFFF	13.66	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003490

Deuteranopia (green-blind)

#00278B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #10188d;
/* rgb */ color: rgb(16, 24, 141);
/* oklch */ color: oklch(31.7% 0.183 267.5);

Tailwind

colors: {
  custom: {
    50: '#6c58b0',
    500: '#10188d',
    950: '#000000',
  },
}

SCSS

$custom: #10188d;
$custom-light: #6c58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#10188d",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 141
  },
  "hsl": {
    "h": 236.16,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31742,
    "c": 0.18348,
    "h": 267.5
  },
  "luminance": 0.02687
}

Semantic roles & 50–950 ramp

primary

#10188D

secondary

#C2B937

accent

#E932F6

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080311

muted

#7B7880

Preview Lab

Preview with #10188D

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

Preview Lab → · Contrast checker → · Palette generator →