#311CB3#311CB3

#311CB3 is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.6% C 0.216 H 275.5°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#311CB3
RGB	rgb(49, 28, 179)
HSL	hsl(248, 73%, 41%)
HSV	hsv(248, 84%, 70%)
CMYK	cmyk(72.6%, 84.4%, 0%, 29.8%)
CIE-LAB	lab(25.97, 53.67, -74.41)
CIE-LCH	lch(25.97, 91.74, 305.80°)
OKLab	oklab(38.6% 0.0208 -0.2151)
OKLCH	oklch(38.6% 0.216 275.5)
XYZ	xyz(9.8159, 4.7372, 43.0361)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CB3 #9EB31C

analogous

#1C53B3 #311CB3 #7C1CB3

triadic

#311CB3 #B3311C #1CB331

tetradic

#311CB3 #B31C53 #9EB31C #1CB37C

square

#311CB3 #B31C53 #9EB31C #1CB37C

split-complementary

#311CB3 #B37C1C #53B31C

monochromatic

#140B49 #23147E #311CB3 #462EDE #7563E7

Accessibility & contrast

On white

10.78

#311CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#311CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CB3

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CB3	#FFFFFF	#000000	##FFFFFF
##311CB3	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0037B0

Tritanopia (blue-blind)

#004D6A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #311cb3;
/* rgb */ color: rgb(49, 28, 179);
/* oklch */ color: oklch(38.6% 0.216 275.5);

Tailwind

colors: {
  custom: {
    50: '#7f5fcb',
    500: '#311cb3',
    950: '#000000',
  },
}

SCSS

$custom: #311cb3;
$custom-light: #7f5fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#311cb3",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 179
  },
  "hsl": {
    "h": 248.344,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.386,
    "c": 0.21606,
    "h": 275.5
  },
  "luminance": 0.04738
}

Semantic roles & 50–950 ramp

primary

#311CB3

secondary

#BCCB5F

accent

#F038D6

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311CB3

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

Preview Lab → · Contrast checker → · Palette generator →