#1B0F5E#1B0F5E

#1B0F5E is a dark, vivid blue. Relative luminance 0.014; OKLCH L 25.4% C 0.130 H 278.7°. Best body text is #FFFFFF at 16.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B0F5E
RGB	rgb(27, 15, 94)
HSL	hsl(249, 72%, 21%)
HSV	hsv(249, 84%, 37%)
CMYK	cmyk(71.3%, 84%, 0%, 63.1%)
CIE-LAB	lab(11.84, 31.46, -44.33)
CIE-LCH	lch(11.84, 54.37, 305.36°)
OKLab	oklab(25.4% 0.0197 -0.128)
OKLCH	oklch(25.4% 0.13 278.7)
XYZ	xyz(2.6425, 1.3826, 10.7151)
Luminance	0.0138 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0F5E #525E0F

analogous

#0F2B5E #1B0F5E #430F5E

triadic

#1B0F5E #5E1B0F #0F5E1B

tetradic

#1B0F5E #5E0F2B #525E0F #0F5E43

square

#1B0F5E #5E0F2B #525E0F #0F5E43

split-complementary

#1B0F5E #5E430F #2B5E0F

monochromatic

#08041A #0C0729 #1B0F5E #2A1793 #3920C8

Accessibility & contrast

On white

16.45

#1B0F5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#1B0F5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0F5E

16.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0F5E	#FFFFFF	#000000	##FFFFFF
##1B0F5E	1.00	16.45	1.28	16.45
#FFFFFF	16.45	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002260

Deuteranopia (green-blind)

#001C5D

Tritanopia (blue-blind)

#002736

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #1b0f5e;
/* rgb */ color: rgb(27, 15, 94);
/* oklch */ color: oklch(25.4% 0.130 278.7);

Tailwind

colors: {
  custom: {
    50: '#63508d',
    500: '#1b0f5e',
    950: '#000000',
  },
}

SCSS

$custom: #1b0f5e;
$custom-light: #63508d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0f5e",
  "rgb": {
    "r": 27,
    "g": 15,
    "b": 94
  },
  "hsl": {
    "h": 249.114,
    "s": 72.477,
    "l": 21.373
  },
  "oklch": {
    "l": 0.25399,
    "c": 0.12955,
    "h": 278.7
  },
  "luminance": 0.01383
}

Semantic roles & 50–950 ramp

primary

#1B0F5E

secondary

#889731

accent

#EF39D3

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B0F5E

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

Preview Lab → · Contrast checker → · Palette generator →