#183B74#183B74

#183B74 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.106 H 259.7°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#183B74
RGB	rgb(24, 59, 116)
HSL	hsl(217, 66%, 27%)
HSV	hsv(217, 79%, 45%)
CMYK	cmyk(79.3%, 49.1%, 0%, 54.5%)
CIE-LAB	lab(25.51, 9.56, -36.41)
CIE-LCH	lch(25.51, 37.65, 284.72°)
OKLab	oklab(36.09% -0.0189 -0.1045)
OKLCH	oklch(36.09% 0.106 259.7)
XYZ	xyz(5.0919, 4.5825, 17.1358)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B74 #745118

analogous

#186974 #183B74 #231874

triadic

#183B74 #74183B #3B7418

tetradic

#183B74 #741869 #745118 #187423

square

#183B74 #741869 #745118 #187423

split-complementary

#183B74 #742318 #697418

monochromatic

#050D19 #0E2141 #183B74 #2255A7 #3270D5

Accessibility & contrast

On white

10.96

#183B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#183B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B74

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B74	#FFFFFF	#000000	##FFFFFF
##183B74	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4176

Deuteranopia (green-blind)

#043973

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183b74;
/* rgb */ color: rgb(24, 59, 116);
/* oklch */ color: oklch(36.1% 0.106 259.7);

Tailwind

colors: {
  custom: {
    50: '#64709c',
    500: '#183b74',
    950: '#000000',
  },
}

SCSS

$custom: #183b74;
$custom-light: #64709c;
$custom-dark: #000000;

JSON

{
  "hex": "#183b74",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 116
  },
  "hsl": {
    "h": 217.174,
    "s": 65.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36087,
    "c": 0.1062,
    "h": 259.7
  },
  "luminance": 0.04583
}

Semantic roles & 50–950 ramp

primary

#183B74

secondary

#A9813F

accent

#A83FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B74

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

Preview Lab → · Contrast checker → · Palette generator →