#183D74#183D74

#183D74 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.104 H 258.5°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#183D74
RGB	rgb(24, 61, 116)
HSL	hsl(216, 66%, 27%)
HSV	hsv(216, 79%, 45%)
CMYK	cmyk(79.3%, 47.4%, 0%, 54.5%)
CIE-LAB	lab(26.13, 8.16, -35.41)
CIE-LCH	lch(26.13, 36.34, 282.98°)
OKLab	oklab(36.57% -0.0207 -0.1015)
OKLCH	oklch(36.57% 0.104 258.5)
XYZ	xyz(5.1967, 4.7920, 17.1707)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D74 #744F18

analogous

#186B74 #183D74 #211874

triadic

#183D74 #74183D #3D7418

tetradic

#183D74 #74186B #744F18 #187421

square

#183D74 #74186B #744F18 #187421

split-complementary

#183D74 #742118 #6B7418

monochromatic

#050D19 #0E2241 #183D74 #2258A7 #3273D5

Accessibility & contrast

On white

10.72

#183D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D74

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D74	#FFFFFF	#000000	##FFFFFF
##183D74	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204276

Deuteranopia (green-blind)

#0C3A73

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183d74;
/* rgb */ color: rgb(24, 61, 116);
/* oklch */ color: oklch(36.6% 0.104 258.5);

Tailwind

colors: {
  custom: {
    50: '#64729c',
    500: '#183d74',
    950: '#000000',
  },
}

SCSS

$custom: #183d74;
$custom-light: #64729c;
$custom-dark: #000000;

JSON

{
  "hex": "#183d74",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 116
  },
  "hsl": {
    "h": 215.87,
    "s": 65.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36567,
    "c": 0.10362,
    "h": 258.5
  },
  "luminance": 0.04793
}

Semantic roles & 50–950 ramp

primary

#183D74

secondary

#A97E3F

accent

#A43FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183D74

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

Preview Lab → · Contrast checker → · Palette generator →