#311CA1#311CA1

#311CA1 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.5% C 0.196 H 277.7°. Best body text is #FFFFFF at 11.59:1 contrast (WCAG AA passes).

Color values

HEX	#311CA1
RGB	rgb(49, 28, 161)
HSL	hsl(249, 70%, 37%)
HSV	hsv(249, 83%, 63%)
CMYK	cmyk(69.6%, 82.6%, 0%, 36.9%)
CIE-LAB	lab(23.86, 48.36, -67.06)
CIE-LCH	lch(23.86, 82.67, 305.80°)
OKLab	oklab(36.53% 0.0263 -0.1937)
OKLCH	oklch(36.53% 0.196 277.7)
XYZ	xyz(8.1128, 4.0560, 34.0666)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CA1 #8CA11C

analogous

#1C49A1 #311CA1 #741CA1

triadic

#311CA1 #A1311C #1CA131

tetradic

#311CA1 #A11C49 #8CA11C #1CA174

square

#311CA1 #A11C49 #8CA11C #1CA174

split-complementary

#311CA1 #A1741C #49A11C

monochromatic

#110A39 #21136D #311CA1 #4125D5 #6C56E2

Accessibility & contrast

On white

11.59

#311CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#311CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CA1

11.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CA1	#FFFFFF	#000000	##FFFFFF
##311CA1	1.00	11.59	1.81	11.59
#FFFFFF	11.59	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00339F

Tritanopia (blue-blind)

#004660

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #311ca1;
/* rgb */ color: rgb(49, 28, 161);
/* oklch */ color: oklch(36.5% 0.196 277.7);

Tailwind

colors: {
  custom: {
    50: '#7b5dbe',
    500: '#311ca1',
    950: '#000000',
  },
}

SCSS

$custom: #311ca1;
$custom-light: #7b5dbe;
$custom-dark: #000000;

JSON

{
  "hex": "#311ca1",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 161
  },
  "hsl": {
    "h": 249.474,
    "s": 70.37,
    "l": 37.059
  },
  "oklch": {
    "l": 0.36529,
    "c": 0.1955,
    "h": 277.7
  },
  "luminance": 0.04057
}

Semantic roles & 50–950 ramp

primary

#311CA1

secondary

#B3C554

accent

#ED3BD1

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311CA1

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

Preview Lab → · Contrast checker → · Palette generator →