#183A80#183A80

#183A80 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.8% C 0.125 H 262.5°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#183A80
RGB	rgb(24, 58, 128)
HSL	hsl(220, 68%, 30%)
HSV	hsv(220, 81%, 50%)
CMYK	cmyk(81.3%, 54.7%, 0%, 49.8%)
CIE-LAB	lab(26.09, 15.24, -43.04)
CIE-LCH	lch(26.09, 45.66, 289.50°)
OKLab	oklab(36.81% -0.0163 -0.124)
OKLCH	oklch(36.81% 0.125 262.5)
XYZ	xyz(5.7846, 4.7781, 21.0353)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A80 #805E18

analogous

#186E80 #183A80 #2A1880

triadic

#183A80 #80183A #3A8018

tetradic

#183A80 #80186E #805E18 #18802A

square

#183A80 #80186E #805E18 #18802A

split-complementary

#183A80 #802A18 #6E8018

monochromatic

#050C1A #0E234C #183A80 #2251B4 #396DDA

Accessibility & contrast

On white

10.74

#183A80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183A80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A80

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A80	#FFFFFF	#000000	##FFFFFF
##183A80	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#064382

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#004B57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183a80;
/* rgb */ color: rgb(24, 58, 128);
/* oklch */ color: oklch(36.8% 0.125 262.5);

Tailwind

colors: {
  custom: {
    50: '#676fa5',
    500: '#183a80',
    950: '#000000',
  },
}

SCSS

$custom: #183a80;
$custom-light: #676fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#183a80",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 128
  },
  "hsl": {
    "h": 220.385,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.36814,
    "c": 0.12511,
    "h": 262.5
  },
  "luminance": 0.04779
}

Semantic roles & 50–950 ramp

primary

#183A80

secondary

#B48E40

accent

#B23DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A80

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

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