#183AA1#183AA1

#183AA1 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.8% C 0.171 H 265.1°. Best body text is #FFFFFF at 9.73:1 contrast (WCAG AA passes).

Color values

HEX	#183AA1
RGB	rgb(24, 58, 161)
HSL	hsl(225, 74%, 36%)
HSV	hsv(225, 85%, 63%)
CMYK	cmyk(85.1%, 64%, 0%, 36.9%)
CIE-LAB	lab(28.88, 28.55, -58.82)
CIE-LCH	lch(28.88, 65.38, 295.89°)
OKLab	oklab(39.78% -0.0147 -0.1703)
OKLCH	oklch(39.78% 0.171 265.1)
XYZ	xyz(8.3205, 5.7925, 34.3908)
Luminance	0.0579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183AA1 #A17F18

analogous

#187FA1 #183AA1 #3A18A1

triadic

#183AA1 #A1183A #3AA118

tetradic

#183AA1 #A1187F #A17F18 #18A13A

square

#183AA1 #A1187F #A17F18 #18A13A

split-complementary

#183AA1 #A13A18 #7FA118

monochromatic

#081436 #10276C #183AA1 #204DD6 #4F74E5

Accessibility & contrast

On white

9.73

#183AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#183AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183AA1

9.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183AA1	#FFFFFF	#000000	##FFFFFF
##183AA1	1.00	9.73	2.16	9.73
#FFFFFF	9.73	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#003E9F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #183aa1;
/* rgb */ color: rgb(24, 58, 161);
/* oklch */ color: oklch(39.8% 0.171 265.1);

Tailwind

colors: {
  custom: {
    50: '#706fbe',
    500: '#183aa1',
    950: '#000000',
  },
}

SCSS

$custom: #183aa1;
$custom-light: #706fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#183aa1",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 161
  },
  "hsl": {
    "h": 225.109,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39775,
    "c": 0.17098,
    "h": 265.1
  },
  "luminance": 0.05794
}

Semantic roles & 50–950 ramp

primary

#183AA1

secondary

#C7A94E

accent

#C337F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183AA1

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

Preview Lab → · Contrast checker → · Palette generator →