#1B1573#1B1573

#1B1573 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.7% C 0.151 H 274.1°. Best body text is #FFFFFF at 14.99:1 contrast (WCAG AA passes).

Color values

HEX	#1B1573
RGB	rgb(27, 21, 115)
HSL	hsl(244, 69%, 27%)
HSV	hsv(244, 82%, 45%)
CMYK	cmyk(76.5%, 81.7%, 0%, 54.9%)
CIE-LAB	lab(15.52, 35.30, -52.07)
CIE-LCH	lch(15.52, 62.91, 304.13°)
OKLab	oklab(28.72% 0.0108 -0.1506)
OKLCH	oklch(28.72% 0.151 274.1)
XYZ	xyz(3.8136, 2.0068, 16.4027)
Luminance	0.0201 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1573 #6D7315

analogous

#153E73 #1B1573 #4A1573

triadic

#1B1573 #731B15 #15731B

tetradic

#1B1573 #73153E #6D7315 #15734A

square

#1B1573 #73153E #6D7315 #15734A

split-complementary

#1B1573 #734A15 #3E7315

monochromatic

#06051A #0F0C3F #1B1573 #271EA7 #352AD8

Accessibility & contrast

On white

14.99

#1B1573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1B1573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1573

14.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1573	#FFFFFF	#000000	##FFFFFF
##1B1573	1.00	14.99	1.40	14.99
#FFFFFF	14.99	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B76

Deuteranopia (green-blind)

#002271

Tritanopia (blue-blind)

#003244

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #1b1573;
/* rgb */ color: rgb(27, 21, 115);
/* oklch */ color: oklch(28.7% 0.151 274.1);

Tailwind

colors: {
  custom: {
    50: '#68559c',
    500: '#1b1573',
    950: '#000000',
  },
}

SCSS

$custom: #1b1573;
$custom-light: #68559c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1573",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 115
  },
  "hsl": {
    "h": 243.83,
    "s": 69.118,
    "l": 26.667
  },
  "oklch": {
    "l": 0.28716,
    "c": 0.15101,
    "h": 274.1
  },
  "luminance": 0.02007
}

Semantic roles & 50–950 ramp

primary

#1B1573

secondary

#A2A93B

accent

#EC3CE1

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1573

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

Preview Lab → · Contrast checker → · Palette generator →