#183E80#183E80

#183E80 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.120 H 260.6°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#183E80
RGB	rgb(24, 62, 128)
HSL	hsl(218, 68%, 30%)
HSV	hsv(218, 81%, 50%)
CMYK	cmyk(81.3%, 51.6%, 0%, 49.8%)
CIE-LAB	lab(27.29, 12.43, -41.11)
CIE-LCH	lch(27.29, 42.95, 286.82°)
OKLab	oklab(37.73% -0.0195 -0.1183)
OKLCH	oklch(37.73% 0.12 260.6)
XYZ	xyz(5.9942, 5.1972, 21.1051)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E80 #805A18

analogous

#187280 #183E80 #261880

triadic

#183E80 #80183E #3E8018

tetradic

#183E80 #801872 #805A18 #188026

square

#183E80 #801872 #805A18 #188026

split-complementary

#183E80 #802618 #728018

monochromatic

#050C1A #0E254C #183E80 #2257B4 #3974DA

Accessibility & contrast

On white

10.30

#183E80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#183E80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E80

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E80	#FFFFFF	#000000	##FFFFFF
##183E80	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164582

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183e80;
/* rgb */ color: rgb(24, 62, 128);
/* oklch */ color: oklch(37.7% 0.120 260.6);

Tailwind

colors: {
  custom: {
    50: '#6772a5',
    500: '#183e80',
    950: '#000000',
  },
}

SCSS

$custom: #183e80;
$custom-light: #6772a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183e80",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 128
  },
  "hsl": {
    "h": 218.077,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37727,
    "c": 0.11987,
    "h": 260.6
  },
  "luminance": 0.05198
}

Semantic roles & 50–950 ramp

primary

#183E80

secondary

#B48A40

accent

#AB3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183E80

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

Preview Lab → · Contrast checker → · Palette generator →