#1B1F87#1B1F87

#1B1F87 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.5% C 0.167 H 270.8°. Best body text is #FFFFFF at 13.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F87
RGB	rgb(27, 31, 135)
HSL	hsl(238, 67%, 32%)
HSV	hsv(238, 80%, 53%)
CMYK	cmyk(80%, 77%, 0%, 47.1%)
CIE-LAB	lab(19.89, 36.49, -57.59)
CIE-LCH	lch(19.89, 68.18, 302.36°)
OKLab	oklab(32.48% 0.0024 -0.1668)
OKLCH	oklch(32.48% 0.167 270.8)
XYZ	xyz(5.3137, 2.9617, 23.2086)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F87 #87831B

analogous

#1B5587 #1B1F87 #4D1B87

triadic

#1B1F87 #871B1F #1F871B

tetradic

#1B1F87 #871B55 #87831B #1B874D

square

#1B1F87 #871B55 #87831B #1B874D

split-complementary

#1B1F87 #874D1B #55871B

monochromatic

#070821 #111354 #1B1F87 #252BBA #4349D9

Accessibility & contrast

On white

13.19

#1B1F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B1F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F87

13.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F87	#FFFFFF	#000000	##FFFFFF
##1B1F87	1.00	13.19	1.59	13.19
#FFFFFF	13.19	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358A

Deuteranopia (green-blind)

#002B85

Tritanopia (blue-blind)

#003E51

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1f87;
/* rgb */ color: rgb(27, 31, 135);
/* oklch */ color: oklch(32.5% 0.167 270.8);

Tailwind

colors: {
  custom: {
    50: '#6c5cab',
    500: '#1b1f87',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f87;
$custom-light: #6c5cab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f87",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 135
  },
  "hsl": {
    "h": 237.778,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.32482,
    "c": 0.16679,
    "h": 270.8
  },
  "luminance": 0.02962
}

Semantic roles & 50–950 ramp

primary

#1B1F87

secondary

#BAB644

accent

#E33EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1F87

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

Preview Lab → · Contrast checker → · Palette generator →