#10183D#10183D

#10183D is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.072 H 270.5°. Best body text is #FFFFFF at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#10183D
RGB	rgb(16, 24, 61)
HSL	hsl(229, 58%, 15%)
HSV	hsv(229, 74%, 24%)
CMYK	cmyk(73.8%, 60.7%, 0%, 76.1%)
CIE-LAB	lab(9.80, 10.84, -24.94)
CIE-LCH	lch(9.80, 27.19, 293.49°)
OKLab	oklab(22.65% 0.0007 -0.0716)
OKLCH	oklch(22.65% 0.072 270.5)
XYZ	xyz(1.3823, 1.1002, 4.5535)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10183D #3D3510

analogous

#102F3D #10183D #1E103D

triadic

#10183D #3D1018 #183D10

tetradic

#10183D #3D102F #3D3510 #103D1E

square

#10183D #3D102F #3D3510 #103D1E

split-complementary

#10183D #3D1E10 #2F3D10

monochromatic

#060A18 #060A18 #10183D #1D2B6D #293E9E

Accessibility & contrast

On white

17.21

#10183D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#10183D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10183D

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10183D	#FFFFFF	#000000	##FFFFFF
##10183D	1.00	17.21	1.22	17.21
#FFFFFF	17.21	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031D3E

Deuteranopia (green-blind)

#00193C

Tritanopia (blue-blind)

#002127

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10183d;
/* rgb */ color: rgb(16, 24, 61);
/* oklch */ color: oklch(22.7% 0.072 270.5);

Tailwind

colors: {
  custom: {
    50: '#545473',
    500: '#10183d',
    950: '#000000',
  },
}

SCSS

$custom: #10183d;
$custom-light: #545473;
$custom-dark: #000000;

JSON

{
  "hex": "#10183d",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 229.333,
    "s": 58.442,
    "l": 15.098
  },
  "oklch": {
    "l": 0.2265,
    "c": 0.07158,
    "h": 270.5
  },
  "luminance": 0.011
}

Semantic roles & 50–950 ramp

primary

#10183D

secondary

#776B32

accent

#C646E2

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #10183D

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

Preview Lab → · Contrast checker → · Palette generator →