#18399F#18399F

#18399F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.4% C 0.170 H 265.2°. Best body text is #FFFFFF at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#18399F
RGB	rgb(24, 57, 159)
HSL	hsl(225, 74%, 36%)
HSV	hsv(225, 85%, 62%)
CMYK	cmyk(84.9%, 64.2%, 0%, 37.6%)
CIE-LAB	lab(28.44, 28.44, -58.33)
CIE-LCH	lch(28.44, 64.90, 295.99°)
OKLab	oklab(39.39% -0.0142 -0.1689)
OKLCH	oklch(39.39% 0.17 265.2)
XYZ	xyz(8.0956, 5.6227, 33.4528)
Luminance	0.0562 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18399F #9F7E18

analogous

#187C9F #18399F #3A189F

triadic

#18399F #9F1839 #399F18

tetradic

#18399F #9F187C #9F7E18 #189F3A

square

#18399F #9F187C #9F7E18 #189F3A

split-complementary

#18399F #9F3A18 #7C9F18

monochromatic

#081335 #10266A #18399F #204CD4 #4D72E4

Accessibility & contrast

On white

9.88

#18399F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#18399F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18399F

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18399F	#FFFFFF	#000000	##FFFFFF
##18399F	1.00	9.88	2.12	9.88
#FFFFFF	9.88	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA2

Deuteranopia (green-blind)

#003D9D

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #18399f;
/* rgb */ color: rgb(24, 57, 159);
/* oklch */ color: oklch(39.4% 0.170 265.2);

Tailwind

colors: {
  custom: {
    50: '#6f6fbc',
    500: '#18399f',
    950: '#000000',
  },
}

SCSS

$custom: #18399f;
$custom-light: #6f6fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#18399f",
  "rgb": {
    "r": 24,
    "g": 57,
    "b": 159
  },
  "hsl": {
    "h": 225.333,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39391,
    "c": 0.16953,
    "h": 265.2
  },
  "luminance": 0.05624
}

Semantic roles & 50–950 ramp

primary

#18399F

secondary

#C6A84D

accent

#C337F0

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #18399F

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

Preview Lab → · Contrast checker → · Palette generator →