#183D7B#183D7B

#183D7B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.114 H 260.2°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#183D7B
RGB	rgb(24, 61, 123)
HSL	hsl(218, 67%, 29%)
HSV	hsv(218, 80%, 48%)
CMYK	cmyk(80.5%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(26.62, 11.06, -39.05)
CIE-LCH	lch(26.62, 40.58, 285.82°)
OKLab	oklab(37.1% -0.0195 -0.1122)
OKLCH	oklch(37.1% 0.114 260.2)
XYZ	xyz(5.6193, 4.9611, 19.3965)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D7B #7B5618

analogous

#186F7B #183D7B #25187B

triadic

#183D7B #7B183D #3D7B18

tetradic

#183D7B #7B186F #7B5618 #187B25

square

#183D7B #7B186F #7B5618 #187B25

split-complementary

#183D7B #7B2518 #6F7B18

monochromatic

#050D1A #0E2448 #183D7B #2256AE #3672D8

Accessibility & contrast

On white

10.54

#183D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D7B

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D7B	#FFFFFF	#000000	##FFFFFF
##183D7B	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19447D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183d7b;
/* rgb */ color: rgb(24, 61, 123);
/* oklch */ color: oklch(37.1% 0.114 260.2);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#183d7b',
    950: '#000000',
  },
}

SCSS

$custom: #183d7b;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183d7b",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 217.576,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37101,
    "c": 0.1139,
    "h": 260.2
  },
  "luminance": 0.04962
}

Semantic roles & 50–950 ramp

primary

#183D7B

secondary

#B0863F

accent

#AA3EEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #183D7B

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

Preview Lab → · Contrast checker → · Palette generator →