#182D5B#182D5B

#182D5B is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.8% C 0.087 H 263.6°. Best body text is #FFFFFF at 13.42:1 contrast (WCAG AA passes).

Color values

HEX	#182D5B
RGB	rgb(24, 45, 91)
HSL	hsl(221, 58%, 23%)
HSV	hsv(221, 74%, 36%)
CMYK	cmyk(73.6%, 50.5%, 0%, 64.3%)
CIE-LAB	lab(19.33, 9.20, -30.13)
CIE-LCH	lch(19.33, 31.50, 286.98°)
OKLab	oklab(30.77% -0.0096 -0.0863)
OKLCH	oklch(30.77% 0.087 263.6)
XYZ	xyz(3.2027, 2.8260, 10.2722)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#182D5B #5B4618

analogous

#184F5B #182D5B #24185B

triadic

#182D5B #5B182D #2D5B18

tetradic

#182D5B #5B184F #5B4618 #185B24

square

#182D5B #5B184F #5B4618 #185B24

split-complementary

#182D5B #5B2418 #4F5B18

monochromatic

#060C18 #0B152B #182D5B #25458B #325DBC

Accessibility & contrast

On white

13.42

#182D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#182D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #182D5B

13.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##182D5B	#FFFFFF	#000000	##FFFFFF
##182D5B	1.00	13.42	1.57	13.42
#FFFFFF	13.42	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15325D

Deuteranopia (green-blind)

#072C5A

Tritanopia (blue-blind)

#00383F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #182d5b;
/* rgb */ color: rgb(24, 45, 91);
/* oklch */ color: oklch(30.8% 0.087 263.6);

Tailwind

colors: {
  custom: {
    50: '#5e658a',
    500: '#182d5b',
    950: '#000000',
  },
}

SCSS

$custom: #182d5b;
$custom-light: #5e658a;
$custom-dark: #000000;

JSON

{
  "hex": "#182d5b",
  "rgb": {
    "r": 24,
    "g": 45,
    "b": 91
  },
  "hsl": {
    "h": 221.194,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.30773,
    "c": 0.08682,
    "h": 263.6
  },
  "luminance": 0.02826
}

Semantic roles & 50–950 ramp

primary

#182D5B

secondary

#92773D

accent

#B146E1

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05050B

muted

#797A7C

Preview Lab

Preview with #182D5B

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

Preview Lab → · Contrast checker → · Palette generator →