#10183A#10183A

#10183A is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.4% C 0.066 H 270.3°. Best body text is #FFFFFF at 17.30:1 contrast (WCAG AA passes).

Color values

HEX	#10183A
RGB	rgb(16, 24, 58)
HSL	hsl(229, 57%, 15%)
HSV	hsv(229, 72%, 23%)
CMYK	cmyk(72.4%, 58.6%, 0%, 77.3%)
CIE-LAB	lab(9.55, 9.55, -23.20)
CIE-LCH	lch(9.55, 25.09, 292.38°)
OKLab	oklab(22.38% 0.0003 -0.0665)
OKLCH	oklch(22.38% 0.066 270.3)
XYZ	xyz(1.3038, 1.0688, 4.1398)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10183A #3A3210

analogous

#102D3A #10183A #1D103A

triadic

#10183A #3A1018 #183A10

tetradic

#10183A #3A102D #3A3210 #103A1D

square

#10183A #3A102D #3A3210 #103A1D

split-complementary

#10183A #3A1D10 #2D3A10

monochromatic

#070A18 #070A18 #10183A #1D2C6A #2A409A

Accessibility & contrast

On white

17.30

#10183A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#10183A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10183A

17.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10183A	#FFFFFF	#000000	##FFFFFF
##10183A	1.00	17.30	1.21	17.30
#FFFFFF	17.30	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#061D3B

Deuteranopia (green-blind)

#001939

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10183a;
/* rgb */ color: rgb(16, 24, 58);
/* oklch */ color: oklch(22.4% 0.066 270.3);

Tailwind

colors: {
  custom: {
    50: '#535470',
    500: '#10183a',
    950: '#000000',
  },
}

SCSS

$custom: #10183a;
$custom-light: #535470;
$custom-dark: #000000;

JSON

{
  "hex": "#10183a",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 58
  },
  "hsl": {
    "h": 228.571,
    "s": 56.757,
    "l": 14.51
  },
  "oklch": {
    "l": 0.22384,
    "c": 0.06646,
    "h": 270.3
  },
  "luminance": 0.01069
}

Semantic roles & 50–950 ramp

primary

#10183A

secondary

#746732

accent

#C348E0

background

#F4F4F6

surface

#E8E7EC

border

#C4C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #10183A

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

Preview Lab → · Contrast checker → · Palette generator →