#1B1779#1B1779

#1B1779 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.7% C 0.157 H 273.1°. Best body text is #FFFFFF at 14.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B1779
RGB	rgb(27, 23, 121)
HSL	hsl(242, 68%, 28%)
HSV	hsv(242, 81%, 47%)
CMYK	cmyk(77.7%, 81%, 0%, 52.5%)
CIE-LAB	lab(16.63, 36.24, -54.10)
CIE-LCH	lch(16.63, 65.12, 303.82°)
OKLab	oklab(29.7% 0.0085 -0.1565)
OKLCH	oklch(29.7% 0.157 273.1)
XYZ	xyz(4.2084, 2.2258, 18.2933)
Luminance	0.0223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1779 #757917

analogous

#174479 #1B1779 #4C1779

triadic

#1B1779 #791B17 #17791B

tetradic

#1B1779 #791744 #757917 #17794C

square

#1B1779 #791744 #757917 #17794C

split-complementary

#1B1779 #794C17 #447917

monochromatic

#06051A #100D46 #1B1779 #2621AC #3932D8

Accessibility & contrast

On white

14.53

#1B1779 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B1779 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1779

14.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1779	#FFFFFF	#000000	##FFFFFF
##1B1779	1.00	14.53	1.45	14.53
#FFFFFF	14.53	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7C

Deuteranopia (green-blind)

#002477

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b1779;
/* rgb */ color: rgb(27, 23, 121);
/* oklch */ color: oklch(29.7% 0.157 273.1);

Tailwind

colors: {
  custom: {
    50: '#6956a1',
    500: '#1b1779',
    950: '#000000',
  },
}

SCSS

$custom: #1b1779;
$custom-light: #6956a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1779",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 121
  },
  "hsl": {
    "h": 242.449,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.29703,
    "c": 0.15677,
    "h": 273.1
  },
  "luminance": 0.02226
}

Semantic roles & 50–950 ramp

primary

#1B1779

secondary

#A9AE3E

accent

#EB3DE4

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1779

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

Preview Lab → · Contrast checker → · Palette generator →