#1B1055#1B1055

#1B1055 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.5% C 0.116 H 280.7°. Best body text is #FFFFFF at 16.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B1055
RGB	rgb(27, 16, 85)
HSL	hsl(250, 68%, 20%)
HSV	hsv(250, 81%, 33%)
CMYK	cmyk(68.2%, 81.2%, 0%, 66.7%)
CIE-LAB	lab(10.99, 27.80, -39.66)
CIE-LCH	lch(10.99, 48.44, 305.03°)
OKLab	oklab(24.49% 0.0216 -0.1144)
OKLCH	oklch(24.49% 0.116 280.7)
XYZ	xyz(2.2765, 1.2593, 8.7157)
Luminance	0.0126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1055 #4A5510

analogous

#102855 #1B1055 #3E1055

triadic

#1B1055 #551B10 #10551B

tetradic

#1B1055 #551028 #4A5510 #10553E

square

#1B1055 #551028 #4A5510 #10553E

split-complementary

#1B1055 #553E10 #285510

monochromatic

#08051A #0B0621 #1B1055 #2B1A89 #3C23BC

Accessibility & contrast

On white

16.78

#1B1055 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#1B1055 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1055

16.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1055	#FFFFFF	#000000	##FFFFFF
##1B1055	1.00	16.78	1.25	16.78
#FFFFFF	16.78	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002057

Deuteranopia (green-blind)

#001B54

Tritanopia (blue-blind)

#002431

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #1b1055;
/* rgb */ color: rgb(27, 16, 85);
/* oklch */ color: oklch(24.5% 0.116 280.7);

Tailwind

colors: {
  custom: {
    50: '#615086',
    500: '#1b1055',
    950: '#000000',
  },
}

SCSS

$custom: #1b1055;
$custom-light: #615086;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1055",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 85
  },
  "hsl": {
    "h": 249.565,
    "s": 68.317,
    "l": 19.804
  },
  "oklch": {
    "l": 0.24487,
    "c": 0.11647,
    "h": 280.7
  },
  "luminance": 0.01259
}

Semantic roles & 50–950 ramp

primary

#1B1055

secondary

#808F32

accent

#EB3DCF

background

#F6F4F8

surface

#EBE7EF

border

#C6C3CA

text

#05020B

muted

#7A787C

Preview Lab

Preview with #1B1055

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

Preview Lab → · Contrast checker → · Palette generator →