#183F7D#183F7D

#183F7D is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.114 H 259.5°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#183F7D
RGB	rgb(24, 63, 125)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(80.8%, 49.6%, 0%, 51%)
CIE-LAB	lab(27.38, 10.49, -39.09)
CIE-LCH	lch(27.38, 40.47, 285.02°)
OKLab	oklab(37.73% -0.0209 -0.1123)
OKLCH	oklch(37.73% 0.114 259.5)
XYZ	xyz(5.8545, 5.2292, 20.0988)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F7D #7D5618

analogous

#18727D #183F7D #24187D

triadic

#183F7D #7D183F #3F7D18

tetradic

#183F7D #7D1872 #7D5618 #187D24

square

#183F7D #7D1872 #7D5618 #187D24

split-complementary

#183F7D #7D2418 #727D18

monochromatic

#050D1A #0E254A #183F7D #2259B0 #3775D9

Accessibility & contrast

On white

10.26

#183F7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183F7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F7D

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F7D	#FFFFFF	#000000	##FFFFFF
##183F7D	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C467F

Deuteranopia (green-blind)

#003C7C

Tritanopia (blue-blind)

#004E58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183f7d;
/* rgb */ color: rgb(24, 63, 125);
/* oklch */ color: oklch(37.7% 0.114 259.5);

Tailwind

colors: {
  custom: {
    50: '#6673a3',
    500: '#183f7d',
    950: '#000000',
  },
}

SCSS

$custom: #183f7d;
$custom-light: #6673a3;
$custom-dark: #000000;

JSON

{
  "hex": "#183f7d",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 125
  },
  "hsl": {
    "h": 216.832,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37726,
    "c": 0.11422,
    "h": 259.5
  },
  "luminance": 0.0523
}

Semantic roles & 50–950 ramp

primary

#183F7D

secondary

#B2853F

accent

#A83DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F7D

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

Preview Lab → · Contrast checker → · Palette generator →