#1B105C#1B105C

#1B105C is a dark, vivid blue. Relative luminance 0.014; OKLCH L 25.3% C 0.126 H 279.0°. Best body text is #FFFFFF at 16.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B105C
RGB	rgb(27, 16, 92)
HSL	hsl(249, 70%, 21%)
HSV	hsv(249, 83%, 36%)
CMYK	cmyk(70.7%, 82.6%, 0%, 63.9%)
CIE-LAB	lab(11.80, 30.22, -43.06)
CIE-LCH	lch(11.80, 52.61, 305.06°)
OKLab	oklab(25.3% 0.0197 -0.1244)
OKLCH	oklch(25.3% 0.126 279)
XYZ	xyz(2.5684, 1.3761, 10.2534)
Luminance	0.0138 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B105C #515C10

analogous

#102B5C #1B105C #41105C

triadic

#1B105C #5C1B10 #105C1B

tetradic

#1B105C #5C102B #515C10 #105C41

square

#1B105C #5C102B #515C10 #105C41

split-complementary

#1B105C #5C4110 #2B5C10

monochromatic

#08051A #0C0728 #1B105C #2A1990 #3A22C4

Accessibility & contrast

On white

16.47

#1B105C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#1B105C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B105C

16.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B105C	#FFFFFF	#000000	##FFFFFF
##1B105C	1.00	16.47	1.28	16.47
#FFFFFF	16.47	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00225E

Deuteranopia (green-blind)

#001C5B

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #1b105c;
/* rgb */ color: rgb(27, 16, 92);
/* oklch */ color: oklch(25.3% 0.126 279.0);

Tailwind

colors: {
  custom: {
    50: '#62508b',
    500: '#1b105c',
    950: '#000000',
  },
}

SCSS

$custom: #1b105c;
$custom-light: #62508b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b105c",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 92
  },
  "hsl": {
    "h": 248.684,
    "s": 70.37,
    "l": 21.176
  },
  "oklch": {
    "l": 0.25298,
    "c": 0.1259,
    "h": 279
  },
  "luminance": 0.01376
}

Semantic roles & 50–950 ramp

primary

#1B105C

secondary

#879533

accent

#ED3BD3

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B105C

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

Preview Lab → · Contrast checker → · Palette generator →