#10183E#10183E

#10183E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.073 H 270.6°. Best body text is #FFFFFF at 17.18:1 contrast (WCAG AA passes).

Color values

HEX	#10183E
RGB	rgb(16, 24, 62)
HSL	hsl(230, 59%, 15%)
HSV	hsv(230, 74%, 24%)
CMYK	cmyk(74.2%, 61.3%, 0%, 75.7%)
CIE-LAB	lab(9.88, 11.27, -25.51)
CIE-LCH	lch(9.88, 27.89, 293.83°)
OKLab	oklab(22.74% 0.0007 -0.0733)
OKLCH	oklch(22.74% 0.073 270.6)
XYZ	xyz(1.4095, 1.1111, 4.6967)
Luminance	0.0111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10183E #3E3610

analogous

#102F3E #10183E #1F103E

triadic

#10183E #3E1018 #183E10

tetradic

#10183E #3E102F #3E3610 #103E1F

square

#10183E #3E102F #3E3610 #103E1F

split-complementary

#10183E #3E1F10 #2F3E10

monochromatic

#060918 #060918 #10183E #1D2B6F #293E9F

Accessibility & contrast

On white

17.18

#10183E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#10183E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10183E

17.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10183E	#FFFFFF	#000000	##FFFFFF
##10183E	1.00	17.18	1.22	17.18
#FFFFFF	17.18	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021D3F

Deuteranopia (green-blind)

#00193D

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10183e;
/* rgb */ color: rgb(16, 24, 62);
/* oklch */ color: oklch(22.7% 0.073 270.6);

Tailwind

colors: {
  custom: {
    50: '#555474',
    500: '#10183e',
    950: '#000000',
  },
}

SCSS

$custom: #10183e;
$custom-light: #555474;
$custom-dark: #000000;

JSON

{
  "hex": "#10183e",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 62
  },
  "hsl": {
    "h": 229.565,
    "s": 58.974,
    "l": 15.294
  },
  "oklch": {
    "l": 0.22741,
    "c": 0.07327,
    "h": 270.6
  },
  "luminance": 0.01111
}

Semantic roles & 50–950 ramp

primary

#10183E

secondary

#786C32

accent

#C746E2

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #10183E

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

Preview Lab → · Contrast checker → · Palette generator →