#18398F#18398F

#18398F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.148 H 264.4°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#18398F
RGB	rgb(24, 57, 143)
HSL	hsl(223, 71%, 33%)
HSV	hsv(223, 83%, 56%)
CMYK	cmyk(83.2%, 60.1%, 0%, 43.9%)
CIE-LAB	lab(27.03, 22.07, -50.86)
CIE-LCH	lch(27.03, 55.44, 293.46°)
OKLab	oklab(37.9% -0.0145 -0.147)
OKLCH	oklch(37.9% 0.148 264.4)
XYZ	xyz(6.7960, 5.1028, 26.6080)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18398F #8F6E18

analogous

#18758F #18398F #32188F

triadic

#18398F #8F1839 #398F18

tetradic

#18398F #8F1875 #8F6E18 #188F32

square

#18398F #8F1875 #8F6E18 #188F32

split-complementary

#18398F #8F3218 #758F18

monochromatic

#060F26 #0F245B #18398F #214EC3 #426EDF

Accessibility & contrast

On white

10.39

#18398F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#18398F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18398F

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18398F	#FFFFFF	#000000	##FFFFFF
##18398F	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #18398f;
/* rgb */ color: rgb(24, 57, 143);
/* oklch */ color: oklch(37.9% 0.148 264.4);

Tailwind

colors: {
  custom: {
    50: '#6b6eb1',
    500: '#18398f',
    950: '#000000',
  },
}

SCSS

$custom: #18398f;
$custom-light: #6b6eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#18398f",
  "rgb": {
    "r": 24,
    "g": 57,
    "b": 143
  },
  "hsl": {
    "h": 223.361,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37901,
    "c": 0.14773,
    "h": 264.4
  },
  "luminance": 0.05104
}

Semantic roles & 50–950 ramp

primary

#18398F

secondary

#C09D43

accent

#BC3AEE

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #18398F

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

Preview Lab → · Contrast checker → · Palette generator →