#1B1887#1B1887

#1B1887 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.173 H 271.6°. Best body text is #FFFFFF at 13.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B1887
RGB	rgb(27, 24, 135)
HSL	hsl(242, 70%, 31%)
HSV	hsv(242, 82%, 53%)
CMYK	cmyk(80%, 82.2%, 0%, 47.1%)
CIE-LAB	lab(18.52, 40.42, -59.86)
CIE-LCH	lch(18.52, 72.23, 304.03°)
OKLab	oklab(31.52% 0.0048 -0.1733)
OKLCH	oklch(31.52% 0.173 271.6)
XYZ	xyz(5.1503, 2.6350, 23.1541)
Luminance	0.0264 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1887 #848718

analogous

#184C87 #1B1887 #521887

triadic

#1B1887 #871B18 #18871B

tetradic

#1B1887 #87184C #848718 #188752

square

#1B1887 #87184C #848718 #188752

split-complementary

#1B1887 #875218 #4C8718

monochromatic

#06061F #110F53 #1B1887 #2521BB #413DDC

Accessibility & contrast

On white

13.75

#1B1887 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B1887 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1887

13.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1887	#FFFFFF	#000000	##FFFFFF
##1B1887	1.00	13.75	1.53	13.75
#FFFFFF	13.75	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328A

Deuteranopia (green-blind)

#002785

Tritanopia (blue-blind)

#003B50

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b1887;
/* rgb */ color: rgb(27, 24, 135);
/* oklch */ color: oklch(31.5% 0.173 271.6);

Tailwind

colors: {
  custom: {
    50: '#6d58ab',
    500: '#1b1887',
    950: '#000000',
  },
}

SCSS

$custom: #1b1887;
$custom-light: #6d58ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1887",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 135
  },
  "hsl": {
    "h": 241.622,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31518,
    "c": 0.17334,
    "h": 271.6
  },
  "luminance": 0.02636
}

Semantic roles & 50–950 ramp

primary

#1B1887

secondary

#B7BB40

accent

#ED3BE8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1B1887

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

Preview Lab → · Contrast checker → · Palette generator →