#1B0F59#1B0F59

#1B0F59 is a very dark, vivid blue. Relative luminance 0.013; OKLCH L 24.8% C 0.123 H 279.9°. Best body text is #FFFFFF at 16.68:1 contrast (WCAG AA passes).

Color values

HEX	#1B0F59
RGB	rgb(27, 15, 89)
HSL	hsl(250, 71%, 20%)
HSV	hsv(250, 83%, 35%)
CMYK	cmyk(69.7%, 83.1%, 0%, 65.1%)
CIE-LAB	lab(11.25, 29.77, -41.95)
CIE-LCH	lch(11.25, 51.44, 305.36°)
OKLab	oklab(24.81% 0.0212 -0.1211)
OKLCH	oklch(24.81% 0.123 279.9)
XYZ	xyz(2.4254, 1.2957, 9.5715)
Luminance	0.0130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0F59 #4D590F

analogous

#0F2859 #1B0F59 #400F59

triadic

#1B0F59 #591B0F #0F591B

tetradic

#1B0F59 #590F28 #4D590F #0F5940

square

#1B0F59 #590F28 #4D590F #0F5940

split-complementary

#1B0F59 #59400F #28590F

monochromatic

#08041A #0B0625 #1B0F59 #2B188D #3B21C2

Accessibility & contrast

On white

16.68

#1B0F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#1B0F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0F59

16.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0F59	#FFFFFF	#000000	##FFFFFF
##1B0F59	1.00	16.68	1.26	16.68
#FFFFFF	16.68	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215B

Deuteranopia (green-blind)

#001B58

Tritanopia (blue-blind)

#002533

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #1b0f59;
/* rgb */ color: rgb(27, 15, 89);
/* oklch */ color: oklch(24.8% 0.123 279.9);

Tailwind

colors: {
  custom: {
    50: '#624f89',
    500: '#1b0f59',
    950: '#000000',
  },
}

SCSS

$custom: #1b0f59;
$custom-light: #624f89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0f59",
  "rgb": {
    "r": 27,
    "g": 15,
    "b": 89
  },
  "hsl": {
    "h": 249.73,
    "s": 71.154,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24807,
    "c": 0.12295,
    "h": 279.9
  },
  "luminance": 0.01296
}

Semantic roles & 50–950 ramp

primary

#1B0F59

secondary

#839331

accent

#EE3AD1

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020B

muted

#7A787C

Preview Lab

Preview with #1B0F59

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

Preview Lab → · Contrast checker → · Palette generator →