#311D9A#311D9A

#311D9A is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.9% C 0.186 H 278.6°. Best body text is #FFFFFF at 11.84:1 contrast (WCAG AA passes).

Color values

HEX	#311D9A
RGB	rgb(49, 29, 154)
HSL	hsl(250, 68%, 36%)
HSV	hsv(250, 81%, 60%)
CMYK	cmyk(68.2%, 81.2%, 0%, 39.6%)
CIE-LAB	lab(23.22, 45.77, -63.84)
CIE-LCH	lch(23.22, 78.55, 305.64°)
OKLab	oklab(35.85% 0.0279 -0.1844)
OKLCH	oklch(35.85% 0.186 278.6)
XYZ	xyz(7.5368, 3.8641, 30.9143)
Luminance	0.0386 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D9A #869A1D

analogous

#1D479A #311D9A #6F1D9A

triadic

#311D9A #9A311D #1D9A31

tetradic

#311D9A #9A1D47 #869A1D #1D9A6F

square

#311D9A #9A1D47 #869A1D #1D9A6F

split-complementary

#311D9A #9A6F1D #479A1D

monochromatic

#100A33 #211366 #311D9A #4127CE #6953DF

Accessibility & contrast

On white

11.84

#311D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#311D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D9A

11.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D9A	#FFFFFF	#000000	##FFFFFF
##311D9A	1.00	11.84	1.77	11.84
#FFFFFF	11.84	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9D

Deuteranopia (green-blind)

#003298

Tritanopia (blue-blind)

#00435C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311d9a;
/* rgb */ color: rgb(49, 29, 154);
/* oklch */ color: oklch(35.9% 0.186 278.6);

Tailwind

colors: {
  custom: {
    50: '#795db9',
    500: '#311d9a',
    950: '#000000',
  },
}

SCSS

$custom: #311d9a;
$custom-light: #795db9;
$custom-dark: #000000;

JSON

{
  "hex": "#311d9a",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 154
  },
  "hsl": {
    "h": 249.6,
    "s": 68.306,
    "l": 35.882
  },
  "oklch": {
    "l": 0.35853,
    "c": 0.18648,
    "h": 278.6
  },
  "luminance": 0.03865
}

Semantic roles & 50–950 ramp

primary

#311D9A

secondary

#B0C251

accent

#EB3DCF

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #311D9A

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

Preview Lab → · Contrast checker → · Palette generator →