#1B1589#1B1589

#1B1589 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.4% C 0.178 H 271.7°. Best body text is #FFFFFF at 13.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B1589
RGB	rgb(27, 21, 137)
HSL	hsl(243, 73%, 31%)
HSV	hsv(243, 85%, 54%)
CMYK	cmyk(80.3%, 84.7%, 0%, 46.3%)
CIE-LAB	lab(18.25, 42.58, -61.56)
CIE-LCH	lch(18.25, 74.85, 304.67°)
OKLab	oklab(31.41% 0.0052 -0.1781)
OKLCH	oklch(31.41% 0.178 271.7)
XYZ	xyz(5.2340, 2.5749, 23.8832)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1589 #838915

analogous

#154989 #1B1589 #551589

triadic

#1B1589 #891B15 #15891B

tetradic

#1B1589 #891549 #838915 #158955

square

#1B1589 #891549 #838915 #158955

split-complementary

#1B1589 #895515 #498915

monochromatic

#06051F #110D54 #1B1589 #251DBE #4138E0

Accessibility & contrast

On white

13.86

#1B1589 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B1589 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1589

13.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1589	#FFFFFF	#000000	##FFFFFF
##1B1589	1.00	13.86	1.52	13.86
#FFFFFF	13.86	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.86	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: #1b1589;
/* rgb */ color: rgb(27, 21, 137);
/* oklch */ color: oklch(31.4% 0.178 271.7);

Tailwind

colors: {
  custom: {
    50: '#6e56ad',
    500: '#1b1589',
    950: '#000000',
  },
}

SCSS

$custom: #1b1589;
$custom-light: #6e56ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1589",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 137
  },
  "hsl": {
    "h": 243.103,
    "s": 73.418,
    "l": 30.98
  },
  "oklch": {
    "l": 0.31406,
    "c": 0.17821,
    "h": 271.7
  },
  "luminance": 0.02575
}

Semantic roles & 50–950 ramp

primary

#1B1589

secondary

#B6BD3D

accent

#F038E7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1B1589

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

Preview Lab → · Contrast checker → · Palette generator →