#1B1F82#1B1F82

#1B1F82 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.9% C 0.160 H 271.2°. Best body text is #FFFFFF at 13.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F82
RGB	rgb(27, 31, 130)
HSL	hsl(238, 66%, 31%)
HSV	hsv(238, 79%, 51%)
CMYK	cmyk(79.2%, 76.2%, 0%, 49%)
CIE-LAB	lab(19.33, 34.71, -55.37)
CIE-LCH	lch(19.33, 65.35, 302.08°)
OKLab	oklab(31.91% 0.0032 -0.1603)
OKLCH	oklch(31.91% 0.16 271.2)
XYZ	xyz(4.9699, 2.8241, 21.3980)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F82 #827E1B

analogous

#1B5282 #1B1F82 #4A1B82

triadic

#1B1F82 #821B1F #1F821B

tetradic

#1B1F82 #821B52 #827E1B #1B824A

square

#1B1F82 #821B52 #827E1B #1B824A

split-complementary

#1B1F82 #824A1B #52821B

monochromatic

#06071D #10134F #1B1F82 #262BB5 #4046D7

Accessibility & contrast

On white

13.42

#1B1F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B1F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F82

13.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F82	#FFFFFF	#000000	##FFFFFF
##1B1F82	1.00	13.42	1.57	13.42
#FFFFFF	13.42	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003485

Deuteranopia (green-blind)

#002A80

Tritanopia (blue-blind)

#003C4F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b1f82;
/* rgb */ color: rgb(27, 31, 130);
/* oklch */ color: oklch(31.9% 0.160 271.2);

Tailwind

colors: {
  custom: {
    50: '#6b5ca7',
    500: '#1b1f82',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f82;
$custom-light: #6b5ca7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f82",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 130
  },
  "hsl": {
    "h": 237.67,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31914,
    "c": 0.16036,
    "h": 271.2
  },
  "luminance": 0.02825
}

Semantic roles & 50–950 ramp

primary

#1B1F82

secondary

#B6B143

accent

#E23FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1F82

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

Preview Lab → · Contrast checker → · Palette generator →