#183B7F#183B7F

#183B7F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.0% C 0.122 H 261.9°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#183B7F
RGB	rgb(24, 59, 127)
HSL	hsl(220, 68%, 30%)
HSV	hsv(220, 81%, 50%)
CMYK	cmyk(81.1%, 53.5%, 0%, 50.2%)
CIE-LAB	lab(26.31, 14.12, -42.06)
CIE-LCH	lch(26.31, 44.37, 288.56°)
OKLab	oklab(36.96% -0.0172 -0.1211)
OKLCH	oklch(36.96% 0.122 261.9)
XYZ	xyz(5.7700, 4.8538, 20.7073)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B7F #7F5C18

analogous

#186F7F #183B7F #29187F

triadic

#183B7F #7F183B #3B7F18

tetradic

#183B7F #7F186F #7F5C18 #187F29

square

#183B7F #7F186F #7F5C18 #187F29

split-complementary

#183B7F #7F2918 #6F7F18

monochromatic

#050C1A #0E234C #183B7F #2253B2 #386FD9

Accessibility & contrast

On white

10.66

#183B7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183B7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B7F

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B7F	#FFFFFF	#000000	##FFFFFF
##183B7F	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D4381

Deuteranopia (green-blind)

#003A7E

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b7f;
/* rgb */ color: rgb(24, 59, 127);
/* oklch */ color: oklch(37.0% 0.122 261.9);

Tailwind

colors: {
  custom: {
    50: '#6770a5',
    500: '#183b7f',
    950: '#000000',
  },
}

SCSS

$custom: #183b7f;
$custom-light: #6770a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183b7f",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 127
  },
  "hsl": {
    "h": 219.612,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.36958,
    "c": 0.12235,
    "h": 261.9
  },
  "luminance": 0.04854
}

Semantic roles & 50–950 ramp

primary

#183B7F

secondary

#B38C3F

accent

#B03DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B7F

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

Preview Lab → · Contrast checker → · Palette generator →