#1B1590#1B1590

#1B1590 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.3% C 0.187 H 271.1°. Best body text is #FFFFFF at 13.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B1590
RGB	rgb(27, 21, 144)
HSL	hsl(243, 75%, 32%)
HSV	hsv(243, 85%, 56%)
CMYK	cmyk(81.3%, 85.4%, 0%, 43.5%)
CIE-LAB	lab(19.15, 44.80, -64.45)
CIE-LCH	lch(19.15, 78.49, 304.81°)
OKLab	oklab(32.28% 0.0034 -0.1865)
OKLCH	oklch(32.28% 0.187 271.1)
XYZ	xyz(5.7525, 2.7823, 26.6140)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1590 #8A9015

analogous

#154C90 #1B1590 #591590

triadic

#1B1590 #901B15 #15901B

tetradic

#1B1590 #90154C #8A9015 #159059

square

#1B1590 #90154C #8A9015 #159059

split-complementary

#1B1590 #905915 #4C9015

monochromatic

#070525 #110D5B #1B1590 #251DC5 #453DE3

Accessibility & contrast

On white

13.49

#1B1590 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B1590 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1590

13.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1590	#FFFFFF	#000000	##FFFFFF
##1B1590	1.00	13.49	1.56	13.49
#FFFFFF	13.49	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003493

Deuteranopia (green-blind)

#00288E

Tritanopia (blue-blind)

#003D55

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1590;
/* rgb */ color: rgb(27, 21, 144);
/* oklch */ color: oklch(32.3% 0.187 271.1);

Tailwind

colors: {
  custom: {
    50: '#7057b2',
    500: '#1b1590',
    950: '#000000',
  },
}

SCSS

$custom: #1b1590;
$custom-light: #7057b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1590",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 144
  },
  "hsl": {
    "h": 242.927,
    "s": 74.545,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32281,
    "c": 0.18651,
    "h": 271.1
  },
  "luminance": 0.02783
}

Semantic roles & 50–950 ramp

primary

#1B1590

secondary

#BCC23E

accent

#F137E8

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B1590

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

Preview Lab → · Contrast checker → · Palette generator →