#18308E#18308E

#18308E is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.158 H 266.7°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#18308E
RGB	rgb(24, 48, 142)
HSL	hsl(228, 71%, 33%)
HSV	hsv(228, 83%, 56%)
CMYK	cmyk(83.1%, 66.2%, 0%, 44.3%)
CIE-LAB	lab(24.51, 27.88, -54.35)
CIE-LCH	lch(24.51, 61.08, 297.15°)
OKLab	oklab(36.01% -0.0092 -0.1574)
OKLCH	oklch(36.01% 0.158 266.7)
XYZ	xyz(6.3144, 4.2603, 26.0755)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18308E #8E7618

analogous

#186B8E #18308E #3B188E

triadic

#18308E #8E1830 #308E18

tetradic

#18308E #8E186B #8E7618 #188E3B

square

#18308E #8E186B #8E7618 #188E3B

split-complementary

#18308E #8E3B18 #6B8E18

monochromatic

#060D25 #0F1E5A #18308E #2142C2 #4161DF

Accessibility & contrast

On white

11.34

#18308E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#18308E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18308E

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18308E	#FFFFFF	#000000	##FFFFFF
##18308E	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004091

Deuteranopia (green-blind)

#00358C

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #18308e;
/* rgb */ color: rgb(24, 48, 142);
/* oklch */ color: oklch(36.0% 0.158 266.7);

Tailwind

colors: {
  custom: {
    50: '#6c68b0',
    500: '#18308e',
    950: '#000000',
  },
}

SCSS

$custom: #18308e;
$custom-light: #6c68b0;
$custom-dark: #000000;

JSON

{
  "hex": "#18308e",
  "rgb": {
    "r": 24,
    "g": 48,
    "b": 142
  },
  "hsl": {
    "h": 227.797,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36008,
    "c": 0.15764,
    "h": 266.7
  },
  "luminance": 0.04261
}

Semantic roles & 50–950 ramp

primary

#18308E

secondary

#C0A642

accent

#C93AEE

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #18308E

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

Preview Lab → · Contrast checker → · Palette generator →