#1B1569#1B1569

#1B1569 is a dark, vivid blue. Relative luminance 0.018; OKLCH L 27.5% C 0.138 H 275.5°. Best body text is #FFFFFF at 15.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B1569
RGB	rgb(27, 21, 105)
HSL	hsl(244, 67%, 25%)
HSV	hsv(244, 80%, 41%)
CMYK	cmyk(74.3%, 80%, 0%, 58.8%)
CIE-LAB	lab(14.34, 31.84, -47.51)
CIE-LCH	lch(14.34, 57.19, 303.83°)
OKLab	oklab(27.53% 0.0133 -0.1373)
OKLCH	oklch(27.53% 0.138 275.5)
XYZ	xyz(3.2691, 1.7890, 13.5349)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1569 #636915

analogous

#153969 #1B1569 #451569

triadic

#1B1569 #691B15 #15691B

tetradic

#1B1569 #691539 #636915 #156945

square

#1B1569 #691539 #636915 #156945

split-complementary

#1B1569 #694515 #396915

monochromatic

#07051A #0E0B36 #1B1569 #281F9C #3529CF

Accessibility & contrast

On white

15.47

#1B1569 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#1B1569 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1569

15.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1569	#FFFFFF	#000000	##FFFFFF
##1B1569	1.00	15.47	1.36	15.47
#FFFFFF	15.47	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00286B

Deuteranopia (green-blind)

#002068

Tritanopia (blue-blind)

#002E3E

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #1b1569;
/* rgb */ color: rgb(27, 21, 105);
/* oklch */ color: oklch(27.5% 0.138 275.5);

Tailwind

colors: {
  custom: {
    50: '#655495',
    500: '#1b1569',
    950: '#000000',
  },
}

SCSS

$custom: #1b1569;
$custom-light: #655495;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1569",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 105
  },
  "hsl": {
    "h": 244.286,
    "s": 66.667,
    "l": 24.706
  },
  "oklch": {
    "l": 0.27535,
    "c": 0.13799,
    "h": 275.5
  },
  "luminance": 0.01789
}

Semantic roles & 50–950 ramp

primary

#1B1569

secondary

#98A03A

accent

#EA3EDD

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #1B1569

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

Preview Lab → · Contrast checker → · Palette generator →