#180F4B#180F4B

#180F4B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.9% C 0.104 H 281.1°. Best body text is #FFFFFF at 17.37:1 contrast (WCAG AA passes).

Color values

HEX	#180F4B
RGB	rgb(24, 15, 75)
HSL	hsl(249, 67%, 18%)
HSV	hsv(249, 80%, 29%)
CMYK	cmyk(68%, 80%, 0%, 70.6%)
CIE-LAB	lab(9.35, 24.43, -35.49)
CIE-LCH	lch(9.35, 43.08, 304.54°)
OKLab	oklab(22.92% 0.0201 -0.1023)
OKLCH	oklch(22.92% 0.104 281.1)
XYZ	xyz(1.8171, 1.0437, 6.7609)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F4B #424B0F

analogous

#0F244B #180F4B #360F4B

triadic

#180F4B #4B180F #0F4B18

tetradic

#180F4B #4B0F24 #424B0F #0F4B36

square

#180F4B #4B0F24 #424B0F #0F4B36

split-complementary

#180F4B #4B360F #244B0F

monochromatic

#08051A #08051A #180F4B #28197E #3923B1

Accessibility & contrast

On white

17.37

#180F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#180F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F4B

17.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F4B	#FFFFFF	#000000	##FFFFFF
##180F4B	1.00	17.37	1.21	17.37
#FFFFFF	17.37	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C4D

Deuteranopia (green-blind)

#00184A

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #180f4b;
/* rgb */ color: rgb(24, 15, 75);
/* oklch */ color: oklch(22.9% 0.104 281.1);

Tailwind

colors: {
  custom: {
    50: '#5d4e7e',
    500: '#180f4b',
    950: '#000000',
  },
}

SCSS

$custom: #180f4b;
$custom-light: #5d4e7e;
$custom-dark: #000000;

JSON

{
  "hex": "#180f4b",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 75
  },
  "hsl": {
    "h": 249,
    "s": 66.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.22917,
    "c": 0.1043,
    "h": 281.1
  },
  "luminance": 0.01044
}

Semantic roles & 50–950 ramp

primary

#180F4B

secondary

#798530

accent

#EA3ED0

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05010A

muted

#79777C

Preview Lab

Preview with #180F4B

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

Preview Lab → · Contrast checker → · Palette generator →