#1B108D#1B108D

#1B108D is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.4% C 0.186 H 271.6°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B108D
RGB	rgb(27, 16, 141)
HSL	hsl(245, 80%, 31%)
HSV	hsv(245, 89%, 55%)
CMYK	cmyk(80.9%, 88.7%, 0%, 44.7%)
CIE-LAB	lab(18.04, 46.02, -64.43)
CIE-LCH	lch(18.04, 79.18, 305.54°)
OKLab	oklab(31.41% 0.0052 -0.1863)
OKLCH	oklch(31.41% 0.186 271.6)
XYZ	xyz(5.4434, 2.5261, 25.3948)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B108D #828D10

analogous

#10438D #1B108D #59108D

triadic

#1B108D #8D1B10 #108D1B

tetradic

#1B108D #8D1043 #828D10 #108D59

square

#1B108D #8D1043 #828D10 #108D59

split-complementary

#1B108D #8D5910 #438D10

monochromatic

#06041F #100A56 #1B108D #2616C4 #4030E7

Accessibility & contrast

On white

13.95

#1B108D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B108D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B108D

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B108D	#FFFFFF	#000000	##FFFFFF
##1B108D	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003290

Deuteranopia (green-blind)

#00268B

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b108d;
/* rgb */ color: rgb(27, 16, 141);
/* oklch */ color: oklch(31.4% 0.186 271.6);

Tailwind

colors: {
  custom: {
    50: '#6f54b0',
    500: '#1b108d',
    950: '#000000',
  },
}

SCSS

$custom: #1b108d;
$custom-light: #6f54b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b108d",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 141
  },
  "hsl": {
    "h": 245.28,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31405,
    "c": 0.18639,
    "h": 271.6
  },
  "luminance": 0.02527
}

Semantic roles & 50–950 ramp

primary

#1B108D

secondary

#B6C237

accent

#F632E5

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B108D

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

Preview Lab → · Contrast checker → · Palette generator →