#183CA1#183CA1

#183CA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.169 H 264.6°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#183CA1
RGB	rgb(24, 60, 161)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 63%)
CMYK	cmyk(85.1%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(29.41, 27.20, -57.96)
CIE-LCH	lch(29.41, 64.02, 295.14°)
OKLab	oklab(40.16% -0.0158 -0.1678)
OKLCH	oklch(40.16% 0.169 264.6)
XYZ	xyz(8.4233, 5.9981, 34.4251)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183CA1 #A17D18

analogous

#1881A1 #183CA1 #3918A1

triadic

#183CA1 #A1183C #3CA118

tetradic

#183CA1 #A11881 #A17D18 #18A139

square

#183CA1 #A11881 #A17D18 #18A139

split-complementary

#183CA1 #A13918 #81A118

monochromatic

#081436 #10286C #183CA1 #2050D6 #4F76E5

Accessibility & contrast

On white

9.55

#183CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#183CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183CA1

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183CA1	#FFFFFF	#000000	##FFFFFF
##183CA1	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183ca1;
/* rgb */ color: rgb(24, 60, 161);
/* oklch */ color: oklch(40.2% 0.169 264.6);

Tailwind

colors: {
  custom: {
    50: '#7071be',
    500: '#183ca1',
    950: '#000000',
  },
}

SCSS

$custom: #183ca1;
$custom-light: #7071be;
$custom-dark: #000000;

JSON

{
  "hex": "#183ca1",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 224.234,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40164,
    "c": 0.16854,
    "h": 264.6
  },
  "luminance": 0.05999
}

Semantic roles & 50–950 ramp

primary

#183CA1

secondary

#C7A74E

accent

#C037F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183CA1

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

Preview Lab → · Contrast checker → · Palette generator →