#1B105D#1B105D

#1B105D is a dark, vivid blue. Relative luminance 0.014; OKLCH L 25.4% C 0.127 H 278.8°. Best body text is #FFFFFF at 16.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B105D
RGB	rgb(27, 16, 93)
HSL	hsl(249, 71%, 21%)
HSV	hsv(249, 83%, 36%)
CMYK	cmyk(71%, 82.8%, 0%, 63.5%)
CIE-LAB	lab(11.92, 30.57, -43.54)
CIE-LCH	lch(11.92, 53.20, 305.07°)
OKLab	oklab(25.42% 0.0194 -0.1257)
OKLCH	oklch(25.42% 0.127 278.8)
XYZ	xyz(2.6124, 1.3937, 10.4851)
Luminance	0.0139 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B105D #525D10

analogous

#102C5D #1B105D #42105D

triadic

#1B105D #5D1B10 #105D1B

tetradic

#1B105D #5D102C #525D10 #105D42

square

#1B105D #5D102C #525D10 #105D42

split-complementary

#1B105D #5D4210 #2C5D10

monochromatic

#08041A #0C0729 #1B105D #2A1991 #3922C5

Accessibility & contrast

On white

16.42

#1B105D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#1B105D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B105D

16.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B105D	#FFFFFF	#000000	##FFFFFF
##1B105D	1.00	16.42	1.28	16.42
#FFFFFF	16.42	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00225F

Deuteranopia (green-blind)

#001C5C

Tritanopia (blue-blind)

#002736

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #1b105d;
/* rgb */ color: rgb(27, 16, 93);
/* oklch */ color: oklch(25.4% 0.127 278.8);

Tailwind

colors: {
  custom: {
    50: '#63508c',
    500: '#1b105d',
    950: '#000000',
  },
}

SCSS

$custom: #1b105d;
$custom-light: #63508c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b105d",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 93
  },
  "hsl": {
    "h": 248.571,
    "s": 70.642,
    "l": 21.373
  },
  "oklch": {
    "l": 0.25416,
    "c": 0.12723,
    "h": 278.8
  },
  "luminance": 0.01394
}

Semantic roles & 50–950 ramp

primary

#1B105D

secondary

#889633

accent

#ED3AD4

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B105D

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

Preview Lab → · Contrast checker → · Palette generator →