#180F4E#180F4E

#180F4E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.3% C 0.109 H 280.3°. Best body text is #FFFFFF at 17.25:1 contrast (WCAG AA passes).

Color values

HEX	#180F4E
RGB	rgb(24, 15, 78)
HSL	hsl(249, 68%, 18%)
HSV	hsv(249, 81%, 31%)
CMYK	cmyk(69.2%, 80.8%, 0%, 69.4%)
CIE-LAB	lab(9.69, 25.51, -37.02)
CIE-LCH	lch(9.69, 44.96, 304.57°)
OKLab	oklab(23.26% 0.0194 -0.1068)
OKLCH	oklch(23.26% 0.109 280.3)
XYZ	xyz(1.9222, 1.0857, 7.3145)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.89

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F4E #454E0F

analogous

#0F254E #180F4E #370F4E

triadic

#180F4E #4E180F #0F4E18

tetradic

#180F4E #4E0F25 #454E0F #0F4E37

square

#180F4E #4E0F25 #454E0F #0F4E37

split-complementary

#180F4E #4E370F #254E0F

monochromatic

#08051A #08051B #180F4E #281981 #3823B5

Accessibility & contrast

On white

17.25

#180F4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#180F4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F4E

17.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F4E	#FFFFFF	#000000	##FFFFFF
##180F4E	1.00	17.25	1.22	17.25
#FFFFFF	17.25	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D50

Deuteranopia (green-blind)

#00184D

Tritanopia (blue-blind)

#00212D

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #180f4e;
/* rgb */ color: rgb(24, 15, 78);
/* oklch */ color: oklch(23.3% 0.109 280.3);

Tailwind

colors: {
  custom: {
    50: '#5e4e80',
    500: '#180f4e',
    950: '#000000',
  },
}

SCSS

$custom: #180f4e;
$custom-light: #5e4e80;
$custom-dark: #000000;

JSON

{
  "hex": "#180f4e",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 78
  },
  "hsl": {
    "h": 248.571,
    "s": 67.742,
    "l": 18.235
  },
  "oklch": {
    "l": 0.23257,
    "c": 0.10855,
    "h": 280.3
  },
  "luminance": 0.01086
}

Semantic roles & 50–950 ramp

primary

#180F4E

secondary

#7C8831

accent

#EB3DD2

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #180F4E

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

Preview Lab → · Contrast checker → · Palette generator →