#18308D#18308D

#18308D is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.9% C 0.156 H 266.6°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#18308D
RGB	rgb(24, 48, 141)
HSL	hsl(228, 71%, 32%)
HSV	hsv(228, 83%, 55%)
CMYK	cmyk(83%, 66%, 0%, 44.7%)
CIE-LAB	lab(24.42, 27.48, -53.88)
CIE-LCH	lch(24.42, 60.49, 297.02°)
OKLab	oklab(35.91% -0.0092 -0.156)
OKLCH	oklch(35.91% 0.156 266.6)
XYZ	xyz(6.2397, 4.2304, 25.6818)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18308D #8D7518

analogous

#186B8D #18308D #3A188D

triadic

#18308D #8D1830 #308D18

tetradic

#18308D #8D186B #8D7518 #188D3A

square

#18308D #8D186B #8D7518 #188D3A

split-complementary

#18308D #8D3A18 #6B8D18

monochromatic

#060C24 #0F1E59 #18308D #2142C1 #4161DF

Accessibility & contrast

On white

11.37

#18308D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#18308D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18308D

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18308D	#FFFFFF	#000000	##FFFFFF
##18308D	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004090

Deuteranopia (green-blind)

#00358B

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #18308d;
/* rgb */ color: rgb(24, 48, 141);
/* oklch */ color: oklch(35.9% 0.156 266.6);

Tailwind

colors: {
  custom: {
    50: '#6b68af',
    500: '#18308d',
    950: '#000000',
  },
}

SCSS

$custom: #18308d;
$custom-light: #6b68af;
$custom-dark: #000000;

JSON

{
  "hex": "#18308d",
  "rgb": {
    "r": 24,
    "g": 48,
    "b": 141
  },
  "hsl": {
    "h": 227.692,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.35909,
    "c": 0.15628,
    "h": 266.6
  },
  "luminance": 0.04231
}

Semantic roles & 50–950 ramp

primary

#18308D

secondary

#BFA542

accent

#C93AEE

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #18308D

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

Preview Lab → · Contrast checker → · Palette generator →