#181A5B#181A5B

#181A5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.113 H 274.2°. Best body text is #FFFFFF at 15.70:1 contrast (WCAG AA passes).

Color values

HEX	#181A5B
RGB	rgb(24, 26, 91)
HSL	hsl(238, 58%, 23%)
HSV	hsv(238, 74%, 36%)
CMYK	cmyk(73.6%, 71.4%, 0%, 64.3%)
CIE-LAB	lab(13.76, 23.04, -39.18)
CIE-LCH	lch(13.76, 45.45, 300.46°)
OKLab	oklab(26.6% 0.0083 -0.1131)
OKLCH	oklch(26.6% 0.113 274.2)
XYZ	xyz(2.6338, 1.6881, 10.0825)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A5B #5B5918

analogous

#183B5B #181A5B #37185B

triadic

#181A5B #5B181A #1A5B18

tetradic

#181A5B #5B183B #5B5918 #185B37

square

#181A5B #5B183B #5B5918 #185B37

split-complementary

#181A5B #5B3718 #3B5B18

monochromatic

#060718 #0B0C2B #181A5B #25288B #3236BC

Accessibility & contrast

On white

15.70

#181A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A5B

15.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A5B	#FFFFFF	#000000	##FFFFFF
##181A5B	1.00	15.70	1.34	15.70
#FFFFFF	15.70	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002B38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181a5b;
/* rgb */ color: rgb(24, 26, 91);
/* oklch */ color: oklch(26.6% 0.113 274.2);

Tailwind

colors: {
  custom: {
    50: '#60568a',
    500: '#181a5b',
    950: '#000000',
  },
}

SCSS

$custom: #181a5b;
$custom-light: #60568a;
$custom-dark: #000000;

JSON

{
  "hex": "#181a5b",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 91
  },
  "hsl": {
    "h": 238.209,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.26601,
    "c": 0.11345,
    "h": 274.2
  },
  "luminance": 0.01688
}

Semantic roles & 50–950 ramp

primary

#181A5B

secondary

#928F3D

accent

#DD46E1

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #181A5B

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

Preview Lab → · Contrast checker → · Palette generator →