#311FA4#311FA4

#311FA4 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 37.2% C 0.197 H 277.0°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#311FA4
RGB	rgb(49, 31, 164)
HSL	hsl(248, 68%, 38%)
HSV	hsv(248, 81%, 64%)
CMYK	cmyk(70.1%, 81.1%, 0%, 35.7%)
CIE-LAB	lab(24.68, 47.86, -67.52)
CIE-LCH	lch(24.68, 82.76, 305.33°)
OKLab	oklab(37.2% 0.0241 -0.1951)
OKLCH	oklch(37.2% 0.197 277)
XYZ	xyz(8.4553, 4.3125, 35.5016)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FA4 #92A41F

analogous

#1F50A4 #311FA4 #731FA4

triadic

#311FA4 #A4311F #1FA431

tetradic

#311FA4 #A41F50 #92A41F #1FA473

square

#311FA4 #A41F50 #92A41F #1FA473

split-complementary

#311FA4 #A4731F #50A41F

monochromatic

#120C3D #221571 #311FA4 #412AD7 #6F5DE0

Accessibility & contrast

On white

11.27

#311FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#311FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FA4

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FA4	#FFFFFF	#000000	##FFFFFF
##311FA4	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040A8

Deuteranopia (green-blind)

#0035A2

Tritanopia (blue-blind)

#004862

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #311fa4;
/* rgb */ color: rgb(49, 31, 164);
/* oklch */ color: oklch(37.2% 0.197 277.0);

Tailwind

colors: {
  custom: {
    50: '#7b5fc0',
    500: '#311fa4',
    950: '#000000',
  },
}

SCSS

$custom: #311fa4;
$custom-light: #7b5fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#311fa4",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 164
  },
  "hsl": {
    "h": 248.12,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.372,
    "c": 0.19659,
    "h": 277
  },
  "luminance": 0.04313
}

Semantic roles & 50–950 ramp

primary

#311FA4

secondary

#B6C55A

accent

#EB3DD3

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311FA4

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

Preview Lab → · Contrast checker → · Palette generator →