#10183F#10183F

#10183F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.8% C 0.075 H 270.6°. Best body text is #FFFFFF at 17.15:1 contrast (WCAG AA passes).

Color values

HEX	#10183F
RGB	rgb(16, 24, 63)
HSL	hsl(230, 59%, 15%)
HSV	hsv(230, 75%, 25%)
CMYK	cmyk(74.6%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(9.97, 11.70, -26.08)
CIE-LCH	lch(9.97, 28.59, 294.16°)
OKLab	oklab(22.83% 0.0008 -0.0749)
OKLCH	oklch(22.83% 0.075 270.6)
XYZ	xyz(1.4372, 1.1222, 4.8425)
Luminance	0.0112 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10183F #3F3710

analogous

#102F3F #10183F #1F103F

triadic

#10183F #3F1018 #183F10

tetradic

#10183F #3F102F #3F3710 #103F1F

square

#10183F #3F102F #3F3710 #103F1F

split-complementary

#10183F #3F1F10 #2F3F10

monochromatic

#060918 #060918 #10183F #1C2B70 #293DA1

Accessibility & contrast

On white

17.15

#10183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#10183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10183F

17.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10183F	#FFFFFF	#000000	##FFFFFF
##10183F	1.00	17.15	1.22	17.15
#FFFFFF	17.15	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011E40

Deuteranopia (green-blind)

#00193E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10183f;
/* rgb */ color: rgb(16, 24, 63);
/* oklch */ color: oklch(22.8% 0.075 270.6);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#10183f",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 229.787,
    "s": 59.494,
    "l": 15.49
  },
  "oklch": {
    "l": 0.22833,
    "c": 0.07495,
    "h": 270.6
  },
  "luminance": 0.01122
}

Semantic roles & 50–950 ramp

primary

#10183F

secondary

#796D32

accent

#C845E3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #10183F

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

Preview Lab → · Contrast checker → · Palette generator →