#183D7C#183D7C

#183D7C is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.115 H 260.4°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#183D7C
RGB	rgb(24, 61, 124)
HSL	hsl(218, 68%, 29%)
HSV	hsv(218, 81%, 49%)
CMYK	cmyk(80.6%, 50.8%, 0%, 51.4%)
CIE-LAB	lab(26.70, 11.47, -39.56)
CIE-LCH	lch(26.70, 41.19, 286.18°)
OKLab	oklab(37.18% -0.0193 -0.1137)
OKLCH	oklch(37.18% 0.115 260.4)
XYZ	xyz(5.6822, 4.9863, 19.7278)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D7C #7C5718

analogous

#186F7C #183D7C #25187C

triadic

#183D7C #7C183D #3D7C18

tetradic

#183D7C #7C186F #7C5718 #187C25

square

#183D7C #7C186F #7C5718 #187C25

split-complementary

#183D7C #7C2518 #6F7C18

monochromatic

#050D1A #0E2449 #183D7C #2256AF #3672D8

Accessibility & contrast

On white

10.51

#183D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D7C

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D7C	#FFFFFF	#000000	##FFFFFF
##183D7C	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18447E

Deuteranopia (green-blind)

#003B7B

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183d7c;
/* rgb */ color: rgb(24, 61, 124);
/* oklch */ color: oklch(37.2% 0.115 260.4);

Tailwind

colors: {
  custom: {
    50: '#6671a2',
    500: '#183d7c',
    950: '#000000',
  },
}

SCSS

$custom: #183d7c;
$custom-light: #6671a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183d7c",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 124
  },
  "hsl": {
    "h": 217.8,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37179,
    "c": 0.11536,
    "h": 260.4
  },
  "luminance": 0.04987
}

Semantic roles & 50–950 ramp

primary

#183D7C

secondary

#B1873F

accent

#AA3DEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183D7C

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

Preview Lab → · Contrast checker → · Palette generator →