#311BA1#311BA1

#311BA1 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.4% C 0.196 H 277.8°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#311BA1
RGB	rgb(49, 27, 161)
HSL	hsl(250, 71%, 37%)
HSV	hsv(250, 83%, 63%)
CMYK	cmyk(69.6%, 83.2%, 0%, 36.9%)
CIE-LAB	lab(23.70, 48.81, -67.31)
CIE-LCH	lch(23.70, 83.14, 305.94°)
OKLab	oklab(36.42% 0.0267 -0.1945)
OKLCH	oklch(36.42% 0.196 277.8)
XYZ	xyz(8.0895, 4.0093, 34.0589)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311BA1 #8BA11B

analogous

#1B48A1 #311BA1 #741BA1

triadic

#311BA1 #A1311B #1BA131

tetradic

#311BA1 #A11B48 #8BA11B #1BA174

square

#311BA1 #A11B48 #8BA11B #1BA174

split-complementary

#311BA1 #A1741B #48A11B

monochromatic

#110938 #21126D #311BA1 #4124D5 #6B54E2

Accessibility & contrast

On white

11.65

#311BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#311BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BA1

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311BA1	#FFFFFF	#000000	##FFFFFF
##311BA1	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00339F

Tritanopia (blue-blind)

#004660

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311ba1;
/* rgb */ color: rgb(49, 27, 161);
/* oklch */ color: oklch(36.4% 0.196 277.8);

Tailwind

colors: {
  custom: {
    50: '#7b5dbe',
    500: '#311ba1',
    950: '#000000',
  },
}

SCSS

$custom: #311ba1;
$custom-light: #7b5dbe;
$custom-dark: #000000;

JSON

{
  "hex": "#311ba1",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 161
  },
  "hsl": {
    "h": 249.851,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36424,
    "c": 0.19627,
    "h": 277.8
  },
  "luminance": 0.0401
}

Semantic roles & 50–950 ramp

primary

#311BA1

secondary

#B2C552

accent

#EE3AD0

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311BA1

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

Preview Lab → · Contrast checker → · Palette generator →