#1B1878#1B1878

#1B1878 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.7% C 0.155 H 273.1°. Best body text is #FFFFFF at 14.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B1878
RGB	rgb(27, 24, 120)
HSL	hsl(242, 67%, 28%)
HSV	hsv(242, 80%, 47%)
CMYK	cmyk(77.5%, 80%, 0%, 52.9%)
CIE-LAB	lab(16.71, 35.33, -53.33)
CIE-LCH	lch(16.71, 63.97, 303.52°)
OKLab	oklab(29.72% 0.0083 -0.1543)
OKLCH	oklch(29.72% 0.155 273.1)
XYZ	xyz(4.1677, 2.2419, 17.9787)
Luminance	0.0224 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1878 #757818

analogous

#184578 #1B1878 #4B1878

triadic

#1B1878 #781B18 #18781B

tetradic

#1B1878 #781845 #757818 #18784B

square

#1B1878 #781845 #757818 #18784B

split-complementary

#1B1878 #784B18 #457818

monochromatic

#06051A #100E45 #1B1878 #2622AB #3934D6

Accessibility & contrast

On white

14.50

#1B1878 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B1878 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1878

14.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1878	#FFFFFF	#000000	##FFFFFF
##1B1878	1.00	14.50	1.45	14.50
#FFFFFF	14.50	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7B

Deuteranopia (green-blind)

#002576

Tritanopia (blue-blind)

#003547

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b1878;
/* rgb */ color: rgb(27, 24, 120);
/* oklch */ color: oklch(29.7% 0.155 273.1);

Tailwind

colors: {
  custom: {
    50: '#6957a0',
    500: '#1b1878',
    950: '#000000',
  },
}

SCSS

$custom: #1b1878;
$custom-light: #6957a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1878",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 120
  },
  "hsl": {
    "h": 241.875,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.29723,
    "c": 0.15453,
    "h": 273.1
  },
  "luminance": 0.02242
}

Semantic roles & 50–950 ramp

primary

#1B1878

secondary

#A9AD3F

accent

#EA3EE4

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1878

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

Preview Lab → · Contrast checker → · Palette generator →