#311C9B#311C9B

#311C9B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.9% C 0.188 H 278.6°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#311C9B
RGB	rgb(49, 28, 155)
HSL	hsl(250, 69%, 36%)
HSV	hsv(250, 82%, 61%)
CMYK	cmyk(68.4%, 81.9%, 0%, 39.2%)
CIE-LAB	lab(23.17, 46.55, -64.53)
CIE-LCH	lch(23.17, 79.57, 305.81°)
OKLab	oklab(35.85% 0.0281 -0.1864)
OKLCH	oklch(35.85% 0.188 278.6)
XYZ	xyz(7.5964, 3.8494, 31.3467)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311C9B #869B1C

analogous

#1C469B #311C9B #701C9B

triadic

#311C9B #9B311C #1C9B31

tetradic

#311C9B #9B1C46 #869B1C #1C9B70

square

#311C9B #9B1C46 #869B1C #1C9B70

split-complementary

#311C9B #9B701C #469B1C

monochromatic

#100933 #211367 #311C9B #4125CF #6952E0

Accessibility & contrast

On white

11.86

#311C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#311C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311C9B

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311C9B	#FFFFFF	#000000	##FFFFFF
##311C9B	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9E

Deuteranopia (green-blind)

#003299

Tritanopia (blue-blind)

#00435C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311c9b;
/* rgb */ color: rgb(49, 28, 155);
/* oklch */ color: oklch(35.9% 0.188 278.6);

Tailwind

colors: {
  custom: {
    50: '#795dba',
    500: '#311c9b',
    950: '#000000',
  },
}

SCSS

$custom: #311c9b;
$custom-light: #795dba;
$custom-dark: #000000;

JSON

{
  "hex": "#311c9b",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 155
  },
  "hsl": {
    "h": 249.921,
    "s": 69.399,
    "l": 35.882
  },
  "oklch": {
    "l": 0.35852,
    "c": 0.18849,
    "h": 278.6
  },
  "luminance": 0.0385
}

Semantic roles & 50–950 ramp

primary

#311C9B

secondary

#B0C350

accent

#EC3CCF

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311C9B

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

Preview Lab → · Contrast checker → · Palette generator →