#183F7A#183F7A

#183F7A is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.5% C 0.110 H 258.8°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#183F7A
RGB	rgb(24, 63, 122)
HSL	hsl(216, 67%, 29%)
HSV	hsv(216, 80%, 48%)
CMYK	cmyk(80.3%, 48.4%, 0%, 52.2%)
CIE-LAB	lab(27.17, 9.25, -37.54)
CIE-LCH	lch(27.17, 38.66, 283.84°)
OKLab	oklab(37.5% -0.0214 -0.1077)
OKLCH	oklch(37.5% 0.11 258.8)
XYZ	xyz(5.6658, 5.1537, 19.1047)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F7A #7A5318

analogous

#18707A #183F7A #22187A

triadic

#183F7A #7A183F #3F7A18

tetradic

#183F7A #7A1870 #7A5318 #187A22

square

#183F7A #7A1870 #7A5318 #187A22

split-complementary

#183F7A #7A2218 #707A18

monochromatic

#050D1A #0E2547 #183F7A #2259AD #3576D7

Accessibility & contrast

On white

10.34

#183F7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#183F7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F7A

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F7A	#FFFFFF	#000000	##FFFFFF
##183F7A	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F457C

Deuteranopia (green-blind)

#063C79

Tritanopia (blue-blind)

#004D56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183f7a;
/* rgb */ color: rgb(24, 63, 122);
/* oklch */ color: oklch(37.5% 0.110 258.8);

Tailwind

colors: {
  custom: {
    50: '#6573a1',
    500: '#183f7a',
    950: '#000000',
  },
}

SCSS

$custom: #183f7a;
$custom-light: #6573a1;
$custom-dark: #000000;

JSON

{
  "hex": "#183f7a",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 122
  },
  "hsl": {
    "h": 216.122,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.37497,
    "c": 0.10985,
    "h": 258.8
  },
  "luminance": 0.05154
}

Semantic roles & 50–950 ramp

primary

#183F7A

secondary

#AF823F

accent

#A53EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080F

muted

#7A7B7E

Preview Lab

Preview with #183F7A

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

Preview Lab → · Contrast checker → · Palette generator →