#1B1D91#1B1D91

#1B1D91 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.4% C 0.181 H 270.4°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D91
RGB	rgb(27, 29, 145)
HSL	hsl(239, 69%, 34%)
HSV	hsv(239, 81%, 57%)
CMYK	cmyk(81.4%, 80%, 0%, 43.1%)
CIE-LAB	lab(20.66, 41.09, -62.57)
CIE-LCH	lch(20.66, 74.86, 303.30°)
OKLab	oklab(33.36% 0.0012 -0.1812)
OKLCH	oklch(33.36% 0.181 270.4)
XYZ	xyz(6.0005, 3.1554, 27.0754)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D91 #918F1B

analogous

#1B5891 #1B1D91 #541B91

triadic

#1B1D91 #911B1D #1D911B

tetradic

#1B1D91 #911B58 #918F1B #1B9154

square

#1B1D91 #911B58 #918F1B #1B9154

split-complementary

#1B1D91 #91541B #58911B

monochromatic

#08082A #11135D #1B1D91 #2527C5 #494CDD

Accessibility & contrast

On white

12.87

#1B1D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B1D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D91

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D91	#FFFFFF	#000000	##FFFFFF
##1B1D91	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003894

Deuteranopia (green-blind)

#002C8F

Tritanopia (blue-blind)

#004157

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b1d91;
/* rgb */ color: rgb(27, 29, 145);
/* oklch */ color: oklch(33.4% 0.181 270.4);

Tailwind

colors: {
  custom: {
    50: '#6f5bb3',
    500: '#1b1d91',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d91;
$custom-light: #6f5bb3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d91",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 145
  },
  "hsl": {
    "h": 238.983,
    "s": 68.605,
    "l": 33.725
  },
  "oklch": {
    "l": 0.33364,
    "c": 0.18119,
    "h": 270.4
  },
  "luminance": 0.03156
}

Semantic roles & 50–950 ramp

primary

#1B1D91

secondary

#BFBD49

accent

#E83CEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1D91

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

Preview Lab → · Contrast checker → · Palette generator →