#18366B#18366B

#18366B is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.2% C 0.099 H 260.8°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#18366B
RGB	rgb(24, 54, 107)
HSL	hsl(218, 63%, 26%)
HSV	hsv(218, 78%, 42%)
CMYK	cmyk(77.6%, 49.5%, 0%, 58%)
CIE-LAB	lab(23.32, 9.36, -34.18)
CIE-LCH	lch(23.32, 35.44, 285.32°)
OKLab	oklab(34.2% -0.0158 -0.098)
OKLCH	oklch(34.2% 0.099 260.8)
XYZ	xyz(4.3487, 3.8936, 14.4294)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18366B #6B4D18

analogous

#185F6B #18366B #23186B

triadic

#18366B #6B1836 #366B18

tetradic

#18366B #6B185F #6B4D18 #186B23

square

#18366B #6B185F #6B4D18 #186B23

split-complementary

#18366B #6B2318 #5F6B18

monochromatic

#060D19 #0D1D39 #18366B #234F9D #2E68CF

Accessibility & contrast

On white

11.81

#18366B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#18366B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18366B

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18366B	#FFFFFF	#000000	##FFFFFF
##18366B	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3C6D

Deuteranopia (green-blind)

#05346A

Tritanopia (blue-blind)

#00434B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #18366b;
/* rgb */ color: rgb(24, 54, 107);
/* oklch */ color: oklch(34.2% 0.099 260.8);

Tailwind

colors: {
  custom: {
    50: '#626c96',
    500: '#18366b',
    950: '#000000',
  },
}

SCSS

$custom: #18366b;
$custom-light: #626c96;
$custom-dark: #000000;

JSON

{
  "hex": "#18366b",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 107
  },
  "hsl": {
    "h": 218.313,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.34196,
    "c": 0.09931,
    "h": 260.8
  },
  "luminance": 0.03894
}

Semantic roles & 50–950 ramp

primary

#18366B

secondary

#A17D3E

accent

#AB41E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #18366B

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

Preview Lab → · Contrast checker → · Palette generator →