#183E7B#183E7B

#183E7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.113 H 259.6°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#183E7B
RGB	rgb(24, 62, 123)
HSL	hsl(217, 67%, 29%)
HSV	hsv(217, 80%, 48%)
CMYK	cmyk(80.5%, 49.6%, 0%, 51.8%)
CIE-LAB	lab(26.93, 10.36, -38.55)
CIE-LCH	lch(26.93, 39.92, 285.04°)
OKLab	oklab(37.34% -0.0203 -0.1107)
OKLCH	oklch(37.34% 0.113 259.6)
XYZ	xyz(5.6732, 5.0688, 19.4144)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E7B #7B5518

analogous

#18707B #183E7B #24187B

triadic

#183E7B #7B183E #3E7B18

tetradic

#183E7B #7B1870 #7B5518 #187B24

square

#183E7B #7B1870 #7B5518 #187B24

split-complementary

#183E7B #7B2418 #707B18

monochromatic

#050D1A #0E2448 #183E7B #2258AE #3674D8

Accessibility & contrast

On white

10.43

#183E7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183E7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E7B

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E7B	#FFFFFF	#000000	##FFFFFF
##183E7B	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C447D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#004D56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183e7b;
/* rgb */ color: rgb(24, 62, 123);
/* oklch */ color: oklch(37.3% 0.113 259.6);

Tailwind

colors: {
  custom: {
    50: '#6572a2',
    500: '#183e7b',
    950: '#000000',
  },
}

SCSS

$custom: #183e7b;
$custom-light: #6572a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183e7b",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 123
  },
  "hsl": {
    "h": 216.97,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37336,
    "c": 0.11259,
    "h": 259.6
  },
  "luminance": 0.05069
}

Semantic roles & 50–950 ramp

primary

#183E7B

secondary

#B0843F

accent

#A83EEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06080F

muted

#7A7B7F

Preview Lab

Preview with #183E7B

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

Preview Lab → · Contrast checker → · Palette generator →