#183A87#183A87

#183A87 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.135 H 263.3°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#183A87
RGB	rgb(24, 58, 135)
HSL	hsl(222, 70%, 31%)
HSV	hsv(222, 82%, 53%)
CMYK	cmyk(82.2%, 57%, 0%, 47.1%)
CIE-LAB	lab(26.65, 18.12, -46.52)
CIE-LCH	lch(26.65, 49.92, 291.28°)
OKLab	oklab(37.41% -0.0157 -0.1343)
OKLCH	oklch(37.41% 0.135 263.3)
XYZ	xyz(6.2614, 4.9688, 23.5461)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A87 #876518

analogous

#187187 #183A87 #2E1887

triadic

#183A87 #87183A #3A8718

tetradic

#183A87 #871871 #876518 #18872E

square

#183A87 #871871 #876518 #18872E

split-complementary

#183A87 #872E18 #718718

monochromatic

#060D1F #0F2453 #183A87 #2150BB #3D6EDC

Accessibility & contrast

On white

10.53

#183A87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183A87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A87

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A87	#FFFFFF	#000000	##FFFFFF
##183A87	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448A

Deuteranopia (green-blind)

#003A85

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183a87;
/* rgb */ color: rgb(24, 58, 135);
/* oklch */ color: oklch(37.4% 0.135 263.3);

Tailwind

colors: {
  custom: {
    50: '#696fab',
    500: '#183a87',
    950: '#000000',
  },
}

SCSS

$custom: #183a87;
$custom-light: #696fab;
$custom-dark: #000000;

JSON

{
  "hex": "#183a87",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 135
  },
  "hsl": {
    "h": 221.622,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37408,
    "c": 0.13517,
    "h": 263.3
  },
  "luminance": 0.0497
}

Semantic roles & 50–950 ramp

primary

#183A87

secondary

#BB9540

accent

#B63BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183A87

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

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