#18104B#18104B

#18104B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.1% C 0.103 H 280.8°. Best body text is #FFFFFF at 17.29:1 contrast (WCAG AA passes).

Color values

HEX	#18104B
RGB	rgb(24, 16, 75)
HSL	hsl(248, 65%, 18%)
HSV	hsv(248, 79%, 29%)
CMYK	cmyk(68%, 78.7%, 0%, 70.6%)
CIE-LAB	lab(9.58, 23.78, -35.11)
CIE-LCH	lch(9.58, 42.41, 304.11°)
OKLab	oklab(23.08% 0.0193 -0.1012)
OKLCH	oklch(23.08% 0.103 280.8)
XYZ	xyz(1.8316, 1.0726, 6.7658)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18104B #434B10

analogous

#10254B #18104B #35104B

triadic

#18104B #4B1810 #104B18

tetradic

#18104B #4B1025 #434B10 #104B35

square

#18104B #4B1025 #434B10 #104B35

split-complementary

#18104B #4B3510 #254B10

monochromatic

#080519 #080519 #18104B #281B7D #3826B0

Accessibility & contrast

On white

17.29

#18104B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#18104B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18104B

17.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18104B	#FFFFFF	#000000	##FFFFFF
##18104B	1.00	17.29	1.21	17.29
#FFFFFF	17.29	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D4D

Deuteranopia (green-blind)

#00184A

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #18104b;
/* rgb */ color: rgb(24, 16, 75);
/* oklch */ color: oklch(23.1% 0.103 280.8);

Tailwind

colors: {
  custom: {
    50: '#5d4f7e',
    500: '#18104b',
    950: '#000000',
  },
}

SCSS

$custom: #18104b;
$custom-light: #5d4f7e;
$custom-dark: #000000;

JSON

{
  "hex": "#18104b",
  "rgb": {
    "r": 24,
    "g": 16,
    "b": 75
  },
  "hsl": {
    "h": 248.136,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.23082,
    "c": 0.10305,
    "h": 280.8
  },
  "luminance": 0.01073
}

Semantic roles & 50–950 ramp

primary

#18104B

secondary

#7A8532

accent

#E840D1

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #18104B

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

Preview Lab → · Contrast checker → · Palette generator →