#183E7C#183E7C

#183E7C is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.114 H 259.8°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#183E7C
RGB	rgb(24, 62, 124)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(80.6%, 50%, 0%, 51.4%)
CIE-LAB	lab(27.00, 10.77, -39.07)
CIE-LCH	lch(27.00, 40.52, 285.42°)
OKLab	oklab(37.41% -0.0202 -0.1123)
OKLCH	oklch(37.41% 0.114 259.8)
XYZ	xyz(5.7361, 5.0940, 19.7458)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E7C #7C5618

analogous

#18707C #183E7C #24187C

triadic

#183E7C #7C183E #3E7C18

tetradic

#183E7C #7C1870 #7C5618 #187C24

square

#183E7C #7C1870 #7C5618 #187C24

split-complementary

#183E7C #7C2418 #707C18

monochromatic

#050D1A #0E2449 #183E7C #2258AF #3674D8

Accessibility & contrast

On white

10.40

#183E7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#183E7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E7C

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E7C	#FFFFFF	#000000	##FFFFFF
##183E7C	1.00	10.40	2.02	10.40
#FFFFFF	10.40	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B457E

Deuteranopia (green-blind)

#003C7B

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183e7c;
/* rgb */ color: rgb(24, 62, 124);
/* oklch */ color: oklch(37.4% 0.114 259.8);

Tailwind

colors: {
  custom: {
    50: '#6672a2',
    500: '#183e7c',
    950: '#000000',
  },
}

SCSS

$custom: #183e7c;
$custom-light: #6672a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183e7c",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 124
  },
  "hsl": {
    "h": 217.2,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37413,
    "c": 0.11406,
    "h": 259.8
  },
  "luminance": 0.05095
}

Semantic roles & 50–950 ramp

primary

#183E7C

secondary

#B1863F

accent

#A93DEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183E7C

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

Preview Lab → · Contrast checker → · Palette generator →