#311D97#311D97

#311D97 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.5% C 0.183 H 279.1°. Best body text is #FFFFFF at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#311D97
RGB	rgb(49, 29, 151)
HSL	hsl(250, 68%, 35%)
HSV	hsv(250, 81%, 59%)
CMYK	cmyk(67.5%, 80.8%, 0%, 40.8%)
CIE-LAB	lab(22.88, 44.85, -62.55)
CIE-LCH	lch(22.88, 76.97, 305.64°)
OKLab	oklab(35.52% 0.0288 -0.1806)
OKLCH	oklch(35.52% 0.183 279.1)
XYZ	xyz(7.2901, 3.7655, 29.6148)
Luminance	0.0377 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D97 #83971D

analogous

#1D4697 #311D97 #6E1D97

triadic

#311D97 #97311D #1D9731

tetradic

#311D97 #971D46 #83971D #1D976E

square

#311D97 #971D46 #83971D #1D976E

split-complementary

#311D97 #976E1D #46971D

monochromatic

#100930 #201364 #311D97 #4227CA #6851DE

Accessibility & contrast

On white

11.98

#311D97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#311D97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D97

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D97	#FFFFFF	#000000	##FFFFFF
##311D97	1.00	11.98	1.75	11.98
#FFFFFF	11.98	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9A

Deuteranopia (green-blind)

#003295

Tritanopia (blue-blind)

#00425A

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311d97;
/* rgb */ color: rgb(49, 29, 151);
/* oklch */ color: oklch(35.5% 0.183 279.1);

Tailwind

colors: {
  custom: {
    50: '#795db7',
    500: '#311d97',
    950: '#000000',
  },
}

SCSS

$custom: #311d97;
$custom-light: #795db7;
$custom-dark: #000000;

JSON

{
  "hex": "#311d97",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 151
  },
  "hsl": {
    "h": 249.836,
    "s": 67.778,
    "l": 35.294
  },
  "oklch": {
    "l": 0.3552,
    "c": 0.18291,
    "h": 279.1
  },
  "luminance": 0.03766
}

Semantic roles & 50–950 ramp

primary

#311D97

secondary

#AEC04F

accent

#EB3DCE

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311D97

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

Preview Lab → · Contrast checker → · Palette generator →