#1B1769#1B1769

#1B1769 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.8% C 0.136 H 275.1°. Best body text is #FFFFFF at 15.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B1769
RGB	rgb(27, 23, 105)
HSL	hsl(243, 64%, 25%)
HSV	hsv(243, 78%, 41%)
CMYK	cmyk(74.3%, 78.1%, 0%, 58.8%)
CIE-LAB	lab(14.76, 30.63, -46.80)
CIE-LCH	lch(14.76, 55.94, 303.20°)
OKLab	oklab(27.84% 0.0121 -0.1353)
OKLCH	oklch(27.84% 0.136 275.1)
XYZ	xyz(3.3074, 1.8654, 13.5476)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1769 #656917

analogous

#173C69 #1B1769 #441769

triadic

#1B1769 #691B17 #17691B

tetradic

#1B1769 #69173C #656917 #176944

square

#1B1769 #69173C #656917 #176944

split-complementary

#1B1769 #694417 #3C6917

monochromatic

#060519 #0E0C37 #1B1769 #28229B #352DCD

Accessibility & contrast

On white

15.29

#1B1769 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B1769 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1769

15.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1769	#FFFFFF	#000000	##FFFFFF
##1B1769	1.00	15.29	1.37	15.29
#FFFFFF	15.29	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296B

Deuteranopia (green-blind)

#002168

Tritanopia (blue-blind)

#002F3E

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b1769;
/* rgb */ color: rgb(27, 23, 105);
/* oklch */ color: oklch(27.8% 0.136 275.1);

Tailwind

colors: {
  custom: {
    50: '#655595',
    500: '#1b1769',
    950: '#000000',
  },
}

SCSS

$custom: #1b1769;
$custom-light: #655595;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1769",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 105
  },
  "hsl": {
    "h": 242.927,
    "s": 64.063,
    "l": 25.098
  },
  "oklch": {
    "l": 0.27836,
    "c": 0.13586,
    "h": 275.1
  },
  "luminance": 0.01866
}

Semantic roles & 50–950 ramp

primary

#1B1769

secondary

#9A9F3D

accent

#E741DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #1B1769

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

Preview Lab → · Contrast checker → · Palette generator →