#1B1786#1B1786

#1B1786 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.3% C 0.173 H 271.8°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B1786
RGB	rgb(27, 23, 134)
HSL	hsl(242, 71%, 31%)
HSV	hsv(242, 83%, 53%)
CMYK	cmyk(79.9%, 82.8%, 0%, 47.5%)
CIE-LAB	lab(18.22, 40.61, -59.73)
CIE-LCH	lch(18.22, 72.23, 304.21°)
OKLab	oklab(31.27% 0.0054 -0.1729)
OKLCH	oklch(31.27% 0.173 271.8)
XYZ	xyz(5.0600, 2.5665, 22.7783)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1786 #828617

analogous

#174A86 #1B1786 #521786

triadic

#1B1786 #861B17 #17861B

tetradic

#1B1786 #86174A #828617 #178652

square

#1B1786 #86174A #828617 #178652

split-complementary

#1B1786 #865217 #4A8617

monochromatic

#06051E #100E52 #1B1786 #2620BA #403ADD

Accessibility & contrast

On white

13.88

#1B1786 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B1786 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1786

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1786	#FFFFFF	#000000	##FFFFFF
##1B1786	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003289

Deuteranopia (green-blind)

#002784

Tritanopia (blue-blind)

#003A4F

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b1786;
/* rgb */ color: rgb(27, 23, 134);
/* oklch */ color: oklch(31.3% 0.173 271.8);

Tailwind

colors: {
  custom: {
    50: '#6d57ab',
    500: '#1b1786',
    950: '#000000',
  },
}

SCSS

$custom: #1b1786;
$custom-light: #6d57ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1786",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 134
  },
  "hsl": {
    "h": 242.162,
    "s": 70.701,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31272,
    "c": 0.17296,
    "h": 271.8
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#1B1786

secondary

#B6BA3F

accent

#ED3AE7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1B1786

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

Preview Lab → · Contrast checker → · Palette generator →