#183DA0#183DA0

#183DA0 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.166 H 264.3°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#183DA0
RGB	rgb(24, 61, 160)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 63%)
CMYK	cmyk(85%, 61.9%, 0%, 37.3%)
CIE-LAB	lab(29.59, 26.12, -57.06)
CIE-LCH	lch(29.59, 62.76, 294.60°)
OKLab	oklab(40.27% -0.0163 -0.1652)
OKLCH	oklch(40.27% 0.166 264.3)
XYZ	xyz(8.3883, 6.0687, 33.9802)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183DA0 #A07B18

analogous

#1881A0 #183DA0 #3718A0

triadic

#183DA0 #A0183D #3DA018

tetradic

#183DA0 #A01881 #A07B18 #18A037

square

#183DA0 #A01881 #A07B18 #18A037

split-complementary

#183DA0 #A03718 #81A018

monochromatic

#081436 #10296B #183DA0 #2051D5 #4E77E4

Accessibility & contrast

On white

9.49

#183DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#183DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183DA0

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183DA0	#FFFFFF	#000000	##FFFFFF
##183DA0	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00409E

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #183da0;
/* rgb */ color: rgb(24, 61, 160);
/* oklch */ color: oklch(40.3% 0.166 264.3);

Tailwind

colors: {
  custom: {
    50: '#6f72bd',
    500: '#183da0',
    950: '#000000',
  },
}

SCSS

$custom: #183da0;
$custom-light: #6f72bd;
$custom-dark: #000000;

JSON

{
  "hex": "#183da0",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 160
  },
  "hsl": {
    "h": 223.676,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40269,
    "c": 0.16597,
    "h": 264.3
  },
  "luminance": 0.0607
}

Semantic roles & 50–950 ramp

primary

#183DA0

secondary

#C6A64D

accent

#BE37F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183DA0

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

Preview Lab → · Contrast checker → · Palette generator →