#1B0F5B#1B0F5B

#1B0F5B is a dark, vivid blue. Relative luminance 0.013; OKLCH L 25.0% C 0.126 H 279.4°. Best body text is #FFFFFF at 16.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B0F5B
RGB	rgb(27, 15, 91)
HSL	hsl(249, 72%, 21%)
HSV	hsv(249, 84%, 36%)
CMYK	cmyk(70.3%, 83.5%, 0%, 64.3%)
CIE-LAB	lab(11.48, 30.45, -42.91)
CIE-LCH	lch(11.48, 52.62, 305.36°)
OKLab	oklab(25.04% 0.0206 -0.1239)
OKLCH	oklch(25.04% 0.126 279.4)
XYZ	xyz(2.5105, 1.3298, 10.0199)
Luminance	0.0133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0F5B #4F5B0F

analogous

#0F295B #1B0F5B #410F5B

triadic

#1B0F5B #5B1B0F #0F5B1B

tetradic

#1B0F5B #5B0F29 #4F5B0F #0F5B41

square

#1B0F5B #5B0F29 #4F5B0F #0F5B41

split-complementary

#1B0F5B #5B410F #295B0F

monochromatic

#08041A #0B0626 #1B0F5B #2B1890 #3A20C4

Accessibility & contrast

On white

16.59

#1B0F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#1B0F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0F5B

16.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0F5B	#FFFFFF	#000000	##FFFFFF
##1B0F5B	1.00	16.59	1.27	16.59
#FFFFFF	16.59	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215D

Deuteranopia (green-blind)

#001B5A

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #1b0f5b;
/* rgb */ color: rgb(27, 15, 91);
/* oklch */ color: oklch(25.0% 0.126 279.4);

Tailwind

colors: {
  custom: {
    50: '#624f8a',
    500: '#1b0f5b',
    950: '#000000',
  },
}

SCSS

$custom: #1b0f5b;
$custom-light: #624f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0f5b",
  "rgb": {
    "r": 27,
    "g": 15,
    "b": 91
  },
  "hsl": {
    "h": 249.474,
    "s": 71.698,
    "l": 20.784
  },
  "oklch": {
    "l": 0.25043,
    "c": 0.1256,
    "h": 279.4
  },
  "luminance": 0.0133
}

Semantic roles & 50–950 ramp

primary

#1B0F5B

secondary

#859531

accent

#EE39D2

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B0F5B

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

Preview Lab → · Contrast checker → · Palette generator →