#1B1879#1B1879

#1B1879 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.8% C 0.156 H 273.0°. Best body text is #FFFFFF at 14.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B1879
RGB	rgb(27, 24, 121)
HSL	hsl(242, 67%, 28%)
HSV	hsv(242, 80%, 47%)
CMYK	cmyk(77.7%, 80.2%, 0%, 52.5%)
CIE-LAB	lab(16.83, 35.68, -53.77)
CIE-LCH	lch(16.83, 64.53, 303.56°)
OKLab	oklab(29.84% 0.0081 -0.1556)
OKLCH	oklch(29.84% 0.156 273)
XYZ	xyz(4.2287, 2.2663, 18.3000)
Luminance	0.0227 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1879 #767918

analogous

#184579 #1B1879 #4B1879

triadic

#1B1879 #791B18 #18791B

tetradic

#1B1879 #791845 #767918 #18794B

square

#1B1879 #791845 #767918 #18794B

split-complementary

#1B1879 #794B18 #457918

monochromatic

#06051A #100E46 #1B1879 #2622AC #3A35D7

Accessibility & contrast

On white

14.45

#1B1879 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B1879 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1879

14.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1879	#FFFFFF	#000000	##FFFFFF
##1B1879	1.00	14.45	1.45	14.45
#FFFFFF	14.45	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7C

Deuteranopia (green-blind)

#002577

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b1879;
/* rgb */ color: rgb(27, 24, 121);
/* oklch */ color: oklch(29.8% 0.156 273.0);

Tailwind

colors: {
  custom: {
    50: '#6957a1',
    500: '#1b1879',
    950: '#000000',
  },
}

SCSS

$custom: #1b1879;
$custom-light: #6957a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1879",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 121
  },
  "hsl": {
    "h": 241.856,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.29841,
    "c": 0.15582,
    "h": 273
  },
  "luminance": 0.02267
}

Semantic roles & 50–950 ramp

primary

#1B1879

secondary

#AAAE3F

accent

#EA3EE4

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1879

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

Preview Lab → · Contrast checker → · Palette generator →