#183E8C#183E8C

#183E8C is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.137 H 262.4°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#183E8C
RGB	rgb(24, 62, 140)
HSL	hsl(220, 71%, 32%)
HSV	hsv(220, 83%, 55%)
CMYK	cmyk(82.9%, 55.7%, 0%, 45.1%)
CIE-LAB	lab(28.20, 17.37, -47.09)
CIE-LCH	lch(28.20, 50.19, 290.24°)
OKLab	oklab(38.71% -0.0181 -0.1359)
OKLCH	oklch(38.71% 0.137 262.4)
XYZ	xyz(6.8312, 5.5321, 25.5136)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E8C #8C6618

analogous

#18788C #183E8C #2C188C

triadic

#183E8C #8C183E #3E8C18

tetradic

#183E8C #8C1878 #8C6618 #188C2C

square

#183E8C #8C1878 #8C6618 #188C2C

split-complementary

#183E8C #8C2C18 #788C18

monochromatic

#061024 #0F2758 #183E8C #2155C0 #4074DE

Accessibility & contrast

On white

9.97

#183E8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#183E8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E8C

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E8C	#FFFFFF	#000000	##FFFFFF
##183E8C	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488F

Deuteranopia (green-blind)

#003D8A

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183e8c;
/* rgb */ color: rgb(24, 62, 140);
/* oklch */ color: oklch(38.7% 0.137 262.4);

Tailwind

colors: {
  custom: {
    50: '#6a72ae',
    500: '#183e8c',
    950: '#000000',
  },
}

SCSS

$custom: #183e8c;
$custom-light: #6a72ae;
$custom-dark: #000000;

JSON

{
  "hex": "#183e8c",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 140
  },
  "hsl": {
    "h": 220.345,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38709,
    "c": 0.13708,
    "h": 262.4
  },
  "luminance": 0.05533
}

Semantic roles & 50–950 ramp

primary

#183E8C

secondary

#BF9641

accent

#B33AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #183E8C

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

Preview Lab → · Contrast checker → · Palette generator →