#183D7F#183D7F

#183D7F is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.120 H 260.9°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#183D7F
RGB	rgb(24, 61, 127)
HSL	hsl(218, 68%, 30%)
HSV	hsv(218, 81%, 50%)
CMYK	cmyk(81.1%, 52%, 0%, 50.2%)
CIE-LAB	lab(26.91, 12.72, -41.09)
CIE-LCH	lch(26.91, 43.01, 287.20°)
OKLab	oklab(37.42% -0.0189 -0.1182)
OKLCH	oklch(37.42% 0.12 260.9)
XYZ	xyz(5.8748, 5.0633, 20.7422)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D7F #7F5A18

analogous

#18707F #183D7F #27187F

triadic

#183D7F #7F183D #3D7F18

tetradic

#183D7F #7F1870 #7F5A18 #187F27

square

#183D7F #7F1870 #7F5A18 #187F27

split-complementary

#183D7F #7F2718 #707F18

monochromatic

#050C1A #0E244C #183D7F #2256B2 #3872D9

Accessibility & contrast

On white

10.43

#183D7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183D7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D7F

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D7F	#FFFFFF	#000000	##FFFFFF
##183D7F	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144581

Deuteranopia (green-blind)

#003B7E

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183d7f;
/* rgb */ color: rgb(24, 61, 127);
/* oklch */ color: oklch(37.4% 0.120 260.9);

Tailwind

colors: {
  custom: {
    50: '#6671a5',
    500: '#183d7f',
    950: '#000000',
  },
}

SCSS

$custom: #183d7f;
$custom-light: #6671a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183d7f",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 127
  },
  "hsl": {
    "h": 218.447,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37417,
    "c": 0.11973,
    "h": 260.9
  },
  "luminance": 0.05064
}

Semantic roles & 50–950 ramp

primary

#183D7F

secondary

#B38A3F

accent

#AC3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183D7F

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

Preview Lab → · Contrast checker → · Palette generator →