#183DA1#183DA1

#183DA1 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.167 H 264.4°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#183DA1
RGB	rgb(24, 61, 161)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 63%)
CMYK	cmyk(85.1%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(29.67, 26.52, -57.53)
CIE-LCH	lch(29.67, 63.35, 294.75°)
OKLab	oklab(40.36% -0.0163 -0.1665)
OKLCH	oklch(40.36% 0.167 264.4)
XYZ	xyz(8.4762, 6.1038, 34.4427)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183DA1 #A17C18

analogous

#1882A1 #183DA1 #3818A1

triadic

#183DA1 #A1183D #3DA118

tetradic

#183DA1 #A11882 #A17C18 #18A138

square

#183DA1 #A11882 #A17C18 #18A138

split-complementary

#183DA1 #A13818 #82A118

monochromatic

#081536 #10296C #183DA1 #2051D6 #4F77E5

Accessibility & contrast

On white

9.46

#183DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#183DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183DA1

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183DA1	#FFFFFF	#000000	##FFFFFF
##183DA1	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#00409F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #183da1;
/* rgb */ color: rgb(24, 61, 161);
/* oklch */ color: oklch(40.4% 0.167 264.4);

Tailwind

colors: {
  custom: {
    50: '#7072be',
    500: '#183da1',
    950: '#000000',
  },
}

SCSS

$custom: #183da1;
$custom-light: #7072be;
$custom-dark: #000000;

JSON

{
  "hex": "#183da1",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 223.796,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40362,
    "c": 0.16732,
    "h": 264.4
  },
  "luminance": 0.06105
}

Semantic roles & 50–950 ramp

primary

#183DA1

secondary

#C7A64E

accent

#BF37F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183DA1

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

Preview Lab → · Contrast checker → · Palette generator →