#10183C#10183C

#10183C is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.6% C 0.070 H 270.5°. Best body text is #FFFFFF at 17.24:1 contrast (WCAG AA passes).

Color values

HEX	#10183C
RGB	rgb(16, 24, 60)
HSL	hsl(229, 58%, 15%)
HSV	hsv(229, 73%, 24%)
CMYK	cmyk(73.3%, 60%, 0%, 76.5%)
CIE-LAB	lab(9.72, 10.41, -24.36)
CIE-LCH	lch(9.72, 26.49, 293.14°)
OKLab	oklab(22.56% 0.0006 -0.0699)
OKLCH	oklch(22.56% 0.07 270.5)
XYZ	xyz(1.3557, 1.0896, 4.4130)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10183C #3C3410

analogous

#102E3C #10183C #1E103C

triadic

#10183C #3C1018 #183C10

tetradic

#10183C #3C102E #3C3410 #103C1E

square

#10183C #3C102E #3C3410 #103C1E

split-complementary

#10183C #3C1E10 #2E3C10

monochromatic

#060A18 #060A18 #10183C #1D2B6C #2A3F9D

Accessibility & contrast

On white

17.24

#10183C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#10183C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10183C

17.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10183C	#FFFFFF	#000000	##FFFFFF
##10183C	1.00	17.24	1.22	17.24
#FFFFFF	17.24	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041D3D

Deuteranopia (green-blind)

#00193B

Tritanopia (blue-blind)

#002027

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10183c;
/* rgb */ color: rgb(16, 24, 60);
/* oklch */ color: oklch(22.6% 0.070 270.5);

Tailwind

colors: {
  custom: {
    50: '#545472',
    500: '#10183c',
    950: '#000000',
  },
}

SCSS

$custom: #10183c;
$custom-light: #545472;
$custom-dark: #000000;

JSON

{
  "hex": "#10183c",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 60
  },
  "hsl": {
    "h": 229.091,
    "s": 57.895,
    "l": 14.902
  },
  "oklch": {
    "l": 0.2256,
    "c": 0.06988,
    "h": 270.5
  },
  "luminance": 0.0109
}

Semantic roles & 50–950 ramp

primary

#10183C

secondary

#766A32

accent

#C547E1

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030208

muted

#78787B

Preview Lab

Preview with #10183C

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

Preview Lab → · Contrast checker → · Palette generator →