#1B1471#1B1471

#1B1471 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.3% C 0.149 H 274.5°. Best body text is #FFFFFF at 15.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B1471
RGB	rgb(27, 20, 113)
HSL	hsl(245, 70%, 26%)
HSV	hsv(245, 82%, 44%)
CMYK	cmyk(76.1%, 82.3%, 0%, 55.7%)
CIE-LAB	lab(15.09, 35.17, -51.49)
CIE-LCH	lch(15.09, 62.35, 304.34°)
OKLab	oklab(28.34% 0.0117 -0.1489)
OKLCH	oklch(28.34% 0.149 274.5)
XYZ	xyz(3.6818, 1.9252, 15.7971)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1471 #6A7114

analogous

#143B71 #1B1471 #491471

triadic

#1B1471 #711B14 #14711B

tetradic

#1B1471 #71143B #6A7114 #147149

square

#1B1471 #71143B #6A7114 #147149

split-complementary

#1B1471 #714914 #3B7114

monochromatic

#06051A #0F0B3D #1B1471 #271DA5 #3427D9

Accessibility & contrast

On white

15.16

#1B1471 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1B1471 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1471

15.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1471	#FFFFFF	#000000	##FFFFFF
##1B1471	1.00	15.16	1.39	15.16
#FFFFFF	15.16	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A74

Deuteranopia (green-blind)

#00226F

Tritanopia (blue-blind)

#003042

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1b1471;
/* rgb */ color: rgb(27, 20, 113);
/* oklch */ color: oklch(28.3% 0.149 274.5);

Tailwind

colors: {
  custom: {
    50: '#67549b',
    500: '#1b1471',
    950: '#000000',
  },
}

SCSS

$custom: #1b1471;
$custom-light: #67549b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1471",
  "rgb": {
    "r": 27,
    "g": 20,
    "b": 113
  },
  "hsl": {
    "h": 244.516,
    "s": 69.925,
    "l": 26.078
  },
  "oklch": {
    "l": 0.28342,
    "c": 0.14938,
    "h": 274.5
  },
  "luminance": 0.01926
}

Semantic roles & 50–950 ramp

primary

#1B1471

secondary

#9FA739

accent

#ED3BDF

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1471

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

Preview Lab → · Contrast checker → · Palette generator →