#18308F#18308F

#18308F is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.159 H 266.7°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#18308F
RGB	rgb(24, 48, 143)
HSL	hsl(228, 71%, 33%)
HSV	hsv(228, 83%, 56%)
CMYK	cmyk(83.2%, 66.4%, 0%, 43.9%)
CIE-LAB	lab(24.61, 28.27, -54.81)
CIE-LCH	lch(24.61, 61.67, 297.28°)
OKLab	oklab(36.11% -0.0092 -0.1587)
OKLCH	oklch(36.11% 0.159 266.7)
XYZ	xyz(6.3898, 4.2905, 26.4727)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18308F #8F7718

analogous

#186B8F #18308F #3B188F

triadic

#18308F #8F1830 #308F18

tetradic

#18308F #8F186B #8F7718 #188F3B

square

#18308F #8F186B #8F7718 #188F3B

split-complementary

#18308F #8F3B18 #6B8F18

monochromatic

#060D26 #0F1E5B #18308F #2142C3 #4262DF

Accessibility & contrast

On white

11.30

#18308F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#18308F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18308F

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18308F	#FFFFFF	#000000	##FFFFFF
##18308F	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004092

Deuteranopia (green-blind)

#00358D

Tritanopia (blue-blind)

#00495B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #18308f;
/* rgb */ color: rgb(24, 48, 143);
/* oklch */ color: oklch(36.1% 0.159 266.7);

Tailwind

colors: {
  custom: {
    50: '#6c68b1',
    500: '#18308f',
    950: '#000000',
  },
}

SCSS

$custom: #18308f;
$custom-light: #6c68b1;
$custom-dark: #000000;

JSON

{
  "hex": "#18308f",
  "rgb": {
    "r": 24,
    "g": 48,
    "b": 143
  },
  "hsl": {
    "h": 227.899,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.36107,
    "c": 0.15899,
    "h": 266.7
  },
  "luminance": 0.04291
}

Semantic roles & 50–950 ramp

primary

#18308F

secondary

#C0A743

accent

#CA3AEE

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #18308F

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

Preview Lab → · Contrast checker → · Palette generator →