#1B1F8D#1B1F8D

#1B1F8D is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.2% C 0.174 H 270.4°. Best body text is #FFFFFF at 12.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F8D
RGB	rgb(27, 31, 141)
HSL	hsl(238, 68%, 33%)
HSV	hsv(238, 81%, 55%)
CMYK	cmyk(80.9%, 78%, 0%, 44.7%)
CIE-LAB	lab(20.58, 38.60, -60.21)
CIE-LCH	lch(20.58, 71.52, 302.66°)
OKLab	oklab(33.17% 0.0013 -0.1744)
OKLCH	oklch(33.17% 0.174 270.4)
XYZ	xyz(5.7481, 3.1354, 25.4964)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F8D #8D891B

analogous

#1B588D #1B1F8D #501B8D

triadic

#1B1F8D #8D1B1F #1F8D1B

tetradic

#1B1F8D #8D1B58 #8D891B #1B8D50

square

#1B1F8D #8D1B58 #8D891B #1B8D50

split-complementary

#1B1F8D #8D501B #588D1B

monochromatic

#070826 #11145A #1B1F8D #252AC0 #474CDC

Accessibility & contrast

On white

12.91

#1B1F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B1F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F8D

12.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F8D	#FFFFFF	#000000	##FFFFFF
##1B1F8D	1.00	12.91	1.63	12.91
#FFFFFF	12.91	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002C8B

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b1f8d;
/* rgb */ color: rgb(27, 31, 141);
/* oklch */ color: oklch(33.2% 0.174 270.4);

Tailwind

colors: {
  custom: {
    50: '#6e5cb0',
    500: '#1b1f8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f8d;
$custom-light: #6e5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f8d",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 237.895,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33172,
    "c": 0.17437,
    "h": 270.4
  },
  "luminance": 0.03136
}

Semantic roles & 50–950 ramp

primary

#1B1F8D

secondary

#BDB946

accent

#E53DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1F8D

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

Preview Lab → · Contrast checker → · Palette generator →