#1B1380#1B1380

#1B1380 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.1% C 0.169 H 272.7°. Best body text is #FFFFFF at 14.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B1380
RGB	rgb(27, 19, 128)
HSL	hsl(244, 74%, 29%)
HSV	hsv(244, 85%, 50%)
CMYK	cmyk(78.9%, 85.2%, 0%, 49.8%)
CIE-LAB	lab(16.78, 40.65, -58.32)
CIE-LCH	lch(16.78, 71.09, 304.88°)
OKLab	oklab(30.06% 0.0081 -0.1687)
OKLCH	oklch(30.06% 0.169 272.7)
XYZ	xyz(4.5798, 2.2568, 20.6121)
Luminance	0.0226 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1380 #788013

analogous

#134280 #1B1380 #521380

triadic

#1B1380 #801B13 #13801B

tetradic

#1B1380 #801342 #788013 #138052

square

#1B1380 #801342 #788013 #138052

split-complementary

#1B1380 #805213 #428013

monochromatic

#06041B #100B4B #1B1380 #261BB5 #3B2DE0

Accessibility & contrast

On white

14.47

#1B1380 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B1380 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1380

14.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1380	#FFFFFF	#000000	##FFFFFF
##1B1380	1.00	14.47	1.45	14.47
#FFFFFF	14.47	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E83

Deuteranopia (green-blind)

#00247E

Tritanopia (blue-blind)

#00364B

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b1380;
/* rgb */ color: rgb(27, 19, 128);
/* oklch */ color: oklch(30.1% 0.169 272.7);

Tailwind

colors: {
  custom: {
    50: '#6b55a6',
    500: '#1b1380',
    950: '#000000',
  },
}

SCSS

$custom: #1b1380;
$custom-light: #6b55a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1380",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 128
  },
  "hsl": {
    "h": 244.404,
    "s": 74.15,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30059,
    "c": 0.1689,
    "h": 272.7
  },
  "luminance": 0.02257
}

Semantic roles & 50–950 ramp

primary

#1B1380

secondary

#ACB539

accent

#F137E3

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1B1380

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

Preview Lab → · Contrast checker → · Palette generator →