#311CAD#311CAD

#311CAD is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.9% C 0.209 H 276.2°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#311CAD
RGB	rgb(49, 28, 173)
HSL	hsl(249, 72%, 39%)
HSV	hsv(249, 84%, 68%)
CMYK	cmyk(71.7%, 83.8%, 0%, 32.2%)
CIE-LAB	lab(25.26, 51.92, -72.00)
CIE-LCH	lch(25.26, 88.76, 305.80°)
OKLab	oklab(37.9% 0.0226 -0.2081)
OKLCH	oklch(37.9% 0.209 276.2)
XYZ	xyz(9.2222, 4.4997, 39.9096)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CAD #98AD1C

analogous

#1C4FAD #311CAD #7A1CAD

triadic

#311CAD #AD311C #1CAD31

tetradic

#311CAD #AD1C4F #98AD1C #1CAD7A

square

#311CAD #AD1C4F #98AD1C #1CAD7A

split-complementary

#311CAD #AD7A1C #4FAD1C

monochromatic

#130B44 #221378 #311CAD #442ADC #725EE5

Accessibility & contrast

On white

11.05

#311CAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#311CAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CAD

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CAD	#FFFFFF	#000000	##FFFFFF
##311CAD	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B1

Deuteranopia (green-blind)

#0035AB

Tritanopia (blue-blind)

#004B67

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #311cad;
/* rgb */ color: rgb(49, 28, 173);
/* oklch */ color: oklch(37.9% 0.209 276.2);

Tailwind

colors: {
  custom: {
    50: '#7d5ec7',
    500: '#311cad',
    950: '#000000',
  },
}

SCSS

$custom: #311cad;
$custom-light: #7d5ec7;
$custom-dark: #000000;

JSON

{
  "hex": "#311cad",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 173
  },
  "hsl": {
    "h": 248.69,
    "s": 72.139,
    "l": 39.412
  },
  "oklch": {
    "l": 0.37904,
    "c": 0.20928,
    "h": 276.2
  },
  "luminance": 0.04501
}

Semantic roles & 50–950 ramp

primary

#311CAD

secondary

#B9C95C

accent

#EF39D5

background

#F8F5FC

surface

#F0E9F8

border

#CBC5D1

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #311CAD

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

Preview Lab → · Contrast checker → · Palette generator →