#183A7F#183A7F

#183A7F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.7% C 0.124 H 262.4°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#183A7F
RGB	rgb(24, 58, 127)
HSL	hsl(220, 68%, 30%)
HSV	hsv(220, 81%, 50%)
CMYK	cmyk(81.1%, 54.3%, 0%, 50.2%)
CIE-LAB	lab(26.02, 14.83, -42.54)
CIE-LCH	lch(26.02, 45.05, 289.21°)
OKLab	oklab(36.73% -0.0164 -0.1226)
OKLCH	oklch(36.73% 0.124 262.4)
XYZ	xyz(5.7191, 4.7519, 20.6904)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A7F #7F5D18

analogous

#186E7F #183A7F #29187F

triadic

#183A7F #7F183A #3A7F18

tetradic

#183A7F #7F186E #7F5D18 #187F29

square

#183A7F #7F186E #7F5D18 #187F29

split-complementary

#183A7F #7F2918 #6E7F18

monochromatic

#050C1A #0E224C #183A7F #2252B2 #386DD9

Accessibility & contrast

On white

10.77

#183A7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183A7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A7F

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A7F	#FFFFFF	#000000	##FFFFFF
##183A7F	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084381

Deuteranopia (green-blind)

#00397E

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183a7f;
/* rgb */ color: rgb(24, 58, 127);
/* oklch */ color: oklch(36.7% 0.124 262.4);

Tailwind

colors: {
  custom: {
    50: '#676fa5',
    500: '#183a7f',
    950: '#000000',
  },
}

SCSS

$custom: #183a7f;
$custom-light: #676fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#183a7f",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 127
  },
  "hsl": {
    "h": 220.194,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.36731,
    "c": 0.12367,
    "h": 262.4
  },
  "luminance": 0.04753
}

Semantic roles & 50–950 ramp

primary

#183A7F

secondary

#B38D3F

accent

#B23DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183A7F

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

Preview Lab → · Contrast checker → · Palette generator →