#183B79#183B79

#183B79 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.5% C 0.114 H 260.8°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#183B79
RGB	rgb(24, 59, 121)
HSL	hsl(218, 67%, 28%)
HSV	hsv(218, 80%, 47%)
CMYK	cmyk(80.2%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(25.87, 11.64, -39.00)
CIE-LCH	lch(25.87, 40.70, 286.61°)
OKLab	oklab(36.48% -0.0181 -0.1121)
OKLCH	oklch(36.48% 0.114 260.8)
XYZ	xyz(5.3906, 4.7020, 18.7089)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B79 #795618

analogous

#186B79 #183B79 #261879

triadic

#183B79 #79183B #3B7918

tetradic

#183B79 #79186B #795618 #187926

square

#183B79 #79186B #795618 #187926

split-complementary

#183B79 #792618 #6B7918

monochromatic

#050C1A #0E2246 #183B79 #2254AC #356FD7

Accessibility & contrast

On white

10.82

#183B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B79

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B79	#FFFFFF	#000000	##FFFFFF
##183B79	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16427B

Deuteranopia (green-blind)

#003978

Tritanopia (blue-blind)

#004A54

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183b79;
/* rgb */ color: rgb(24, 59, 121);
/* oklch */ color: oklch(36.5% 0.114 260.8);

Tailwind

colors: {
  custom: {
    50: '#6570a0',
    500: '#183b79',
    950: '#000000',
  },
}

SCSS

$custom: #183b79;
$custom-light: #6570a0;
$custom-dark: #000000;

JSON

{
  "hex": "#183b79",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 218.351,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36476,
    "c": 0.11358,
    "h": 260.8
  },
  "luminance": 0.04703
}

Semantic roles & 50–950 ramp

primary

#183B79

secondary

#AE863F

accent

#AC3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070F

muted

#7A7A7E

Preview Lab

Preview with #183B79

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

Preview Lab → · Contrast checker → · Palette generator →