#183F7C#183F7C

#183F7C is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.6% C 0.113 H 259.2°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#183F7C
RGB	rgb(24, 63, 124)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(80.6%, 49.2%, 0%, 51.4%)
CIE-LAB	lab(27.31, 10.08, -38.57)
CIE-LCH	lch(27.31, 39.87, 284.64°)
OKLab	oklab(37.65% -0.021 -0.1108)
OKLCH	oklch(37.65% 0.113 259.2)
XYZ	xyz(5.7910, 5.2038, 19.7641)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F7C #7C5518

analogous

#18717C #183F7C #23187C

triadic

#183F7C #7C183F #3F7C18

tetradic

#183F7C #7C1871 #7C5518 #187C23

square

#183F7C #7C1871 #7C5518 #187C23

split-complementary

#183F7C #7C2318 #717C18

monochromatic

#050D1A #0E2549 #183F7C #2259AF #3675D8

Accessibility & contrast

On white

10.29

#183F7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#183F7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F7C

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F7C	#FFFFFF	#000000	##FFFFFF
##183F7C	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D457E

Deuteranopia (green-blind)

#013C7B

Tritanopia (blue-blind)

#004E57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183f7c;
/* rgb */ color: rgb(24, 63, 124);
/* oklch */ color: oklch(37.6% 0.113 259.2);

Tailwind

colors: {
  custom: {
    50: '#6673a2',
    500: '#183f7c',
    950: '#000000',
  },
}

SCSS

$custom: #183f7c;
$custom-light: #6673a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183f7c",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 124
  },
  "hsl": {
    "h": 216.6,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37649,
    "c": 0.11276,
    "h": 259.2
  },
  "luminance": 0.05204
}

Semantic roles & 50–950 ramp

primary

#183F7C

secondary

#B1843F

accent

#A73DEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F7C

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

Preview Lab → · Contrast checker → · Palette generator →