#183C75#183C75

#183C75 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.106 H 259.4°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#183C75
RGB	rgb(24, 60, 117)
HSL	hsl(217, 66%, 28%)
HSV	hsv(217, 79%, 46%)
CMYK	cmyk(79.5%, 48.7%, 0%, 54.1%)
CIE-LAB	lab(25.89, 9.28, -36.43)
CIE-LCH	lch(25.89, 37.60, 284.28°)
OKLab	oklab(36.4% -0.0196 -0.1045)
OKLCH	oklch(36.4% 0.106 259.4)
XYZ	xyz(5.2023, 4.7097, 17.4611)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C75 #755118

analogous

#186A75 #183C75 #221875

triadic

#183C75 #75183C #3C7518

tetradic

#183C75 #75186A #755118 #187522

square

#183C75 #75186A #755118 #187522

split-complementary

#183C75 #752218 #6A7518

monochromatic

#050D19 #0E2242 #183C75 #2256A8 #3271D5

Accessibility & contrast

On white

10.81

#183C75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183C75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C75

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C75	#FFFFFF	#000000	##FFFFFF
##183C75	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4277

Deuteranopia (green-blind)

#063974

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183c75;
/* rgb */ color: rgb(24, 60, 117);
/* oklch */ color: oklch(36.4% 0.106 259.4);

Tailwind

colors: {
  custom: {
    50: '#64719d',
    500: '#183c75',
    950: '#000000',
  },
}

SCSS

$custom: #183c75;
$custom-light: #64719d;
$custom-dark: #000000;

JSON

{
  "hex": "#183c75",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 117
  },
  "hsl": {
    "h": 216.774,
    "s": 65.957,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36402,
    "c": 0.10638,
    "h": 259.4
  },
  "luminance": 0.0471
}

Semantic roles & 50–950 ramp

primary

#183C75

secondary

#AA813F

accent

#A73FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C75

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

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