#183B7C#183B7C

#183B7C is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.118 H 261.4°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#183B7C
RGB	rgb(24, 59, 124)
HSL	hsl(219, 68%, 29%)
HSV	hsv(219, 81%, 49%)
CMYK	cmyk(80.6%, 52.4%, 0%, 51.4%)
CIE-LAB	lab(26.09, 12.88, -40.54)
CIE-LCH	lch(26.09, 42.53, 287.63°)
OKLab	oklab(36.71% -0.0176 -0.1166)
OKLCH	oklch(36.71% 0.118 261.4)
XYZ	xyz(5.5774, 4.7767, 19.6929)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B7C #7C5918

analogous

#186D7C #183B7C #27187C

triadic

#183B7C #7C183B #3B7C18

tetradic

#183B7C #7C186D #7C5918 #187C27

square

#183B7C #7C186D #7C5918 #187C27

split-complementary

#183B7C #7C2718 #6D7C18

monochromatic

#050C1A #0E2349 #183B7C #2253AF #366FD8

Accessibility & contrast

On white

10.74

#183B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#183B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B7C

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B7C	#FFFFFF	#000000	##FFFFFF
##183B7C	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)

#12437E

Deuteranopia (green-blind)

#00397B

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b7c;
/* rgb */ color: rgb(24, 59, 124);
/* oklch */ color: oklch(36.7% 0.118 261.4);

Tailwind

colors: {
  custom: {
    50: '#6670a2',
    500: '#183b7c',
    950: '#000000',
  },
}

SCSS

$custom: #183b7c;
$custom-light: #6670a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183b7c",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 124
  },
  "hsl": {
    "h": 219,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36715,
    "c": 0.11797,
    "h": 261.4
  },
  "luminance": 0.04777
}

Semantic roles & 50–950 ramp

primary

#183B7C

secondary

#B1893F

accent

#AE3DEA

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B7C

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

Preview Lab → · Contrast checker → · Palette generator →