#1B1689#1B1689

#1B1689 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.177 H 271.6°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B1689
RGB	rgb(27, 22, 137)
HSL	hsl(243, 72%, 31%)
HSV	hsv(243, 84%, 54%)
CMYK	cmyk(80.3%, 83.9%, 0%, 46.3%)
CIE-LAB	lab(18.42, 42.09, -61.28)
CIE-LCH	lch(18.42, 74.35, 304.48°)
OKLab	oklab(31.52% 0.0049 -0.1773)
OKLCH	oklch(31.52% 0.177 271.6)
XYZ	xyz(5.2527, 2.6124, 23.8895)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1689 #848916

analogous

#164A89 #1B1689 #541689

triadic

#1B1689 #891B16 #16891B

tetradic

#1B1689 #89164A #848916 #168954

square

#1B1689 #89164A #848916 #168954

split-complementary

#1B1689 #895416 #4A8916

monochromatic

#060520 #110E54 #1B1689 #251EBE #413ADF

Accessibility & contrast

On white

13.79

#1B1689 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B1689 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1689

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1689	#FFFFFF	#000000	##FFFFFF
##1B1689	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328C

Deuteranopia (green-blind)

#002787

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b1689;
/* rgb */ color: rgb(27, 22, 137);
/* oklch */ color: oklch(31.5% 0.177 271.6);

Tailwind

colors: {
  custom: {
    50: '#6e57ad',
    500: '#1b1689',
    950: '#000000',
  },
}

SCSS

$custom: #1b1689;
$custom-light: #6e57ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1689",
  "rgb": {
    "r": 27,
    "g": 22,
    "b": 137
  },
  "hsl": {
    "h": 242.609,
    "s": 72.327,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31521,
    "c": 0.17742,
    "h": 271.6
  },
  "luminance": 0.02613
}

Semantic roles & 50–950 ramp

primary

#1B1689

secondary

#B7BD3E

accent

#EF39E7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1B1689

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

Preview Lab → · Contrast checker → · Palette generator →