#181F3F#181F3F

#181F3F is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.1% C 0.061 H 272.1°. Best body text is #FFFFFF at 16.07:1 contrast (WCAG AA passes).

Color values

HEX	#181F3F
RGB	rgb(24, 31, 63)
HSL	hsl(229, 45%, 17%)
HSV	hsv(229, 62%, 25%)
CMYK	cmyk(61.9%, 50.8%, 0%, 75.3%)
CIE-LAB	lab(12.82, 8.16, -21.48)
CIE-LCH	lch(12.82, 22.98, 290.81°)
OKLab	oklab(25.14% 0.0022 -0.0611)
OKLCH	oklch(25.14% 0.061 272.1)
XYZ	xyz(1.7636, 1.5329, 4.9046)
Luminance	0.0153 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F3F #3F3818

analogous

#18333F #181F3F #25183F

triadic

#181F3F #3F181F #1F3F18

tetradic

#181F3F #3F1833 #3F3818 #183F25

square

#181F3F #3F1833 #3F3818 #183F25

split-complementary

#181F3F #3F2518 #333F18

monochromatic

#080B16 #080B16 #181F3F #29356B #3A4B98

Accessibility & contrast

On white

16.07

#181F3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181F3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F3F

16.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F3F	#FFFFFF	#000000	##FFFFFF
##181F3F	1.00	16.07	1.31	16.07
#FFFFFF	16.07	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#112340

Deuteranopia (green-blind)

#0C203E

Tritanopia (blue-blind)

#05262B

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181f3f;
/* rgb */ color: rgb(24, 31, 63);
/* oklch */ color: oklch(25.1% 0.061 272.1);

Tailwind

colors: {
  custom: {
    50: '#585a74',
    500: '#181f3f',
    950: '#000000',
  },
}

SCSS

$custom: #181f3f;
$custom-light: #585a74;
$custom-dark: #000000;

JSON

{
  "hex": "#181f3f",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 63
  },
  "hsl": {
    "h": 229.231,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.25143,
    "c": 0.06113,
    "h": 272.1
  },
  "luminance": 0.01533
}

Semantic roles & 50–950 ramp

primary

#181F3F

secondary

#756B3D

accent

#BD53D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #181F3F

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

Preview Lab → · Contrast checker → · Palette generator →