#311CA0#311CA0

#311CA0 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.4% C 0.194 H 277.9°. Best body text is #FFFFFF at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#311CA0
RGB	rgb(49, 28, 160)
HSL	hsl(250, 70%, 37%)
HSV	hsv(250, 83%, 63%)
CMYK	cmyk(69.4%, 82.5%, 0%, 37.3%)
CIE-LAB	lab(23.74, 48.06, -66.64)
CIE-LCH	lch(23.74, 82.16, 305.80°)
OKLab	oklab(36.42% 0.0266 -0.1925)
OKLCH	oklch(36.42% 0.194 277.9)
XYZ	xyz(8.0250, 4.0208, 33.6041)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CA0 #8BA01C

analogous

#1C49A0 #311CA0 #731CA0

triadic

#311CA0 #A0311C #1CA031

tetradic

#311CA0 #A01C49 #8BA01C #1CA073

square

#311CA0 #A01C49 #8BA01C #1CA073

split-complementary

#311CA0 #A0731C #49A01C

monochromatic

#110A38 #21136C #311CA0 #4125D4 #6B55E1

Accessibility & contrast

On white

11.64

#311CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#311CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CA0

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CA0	#FFFFFF	#000000	##FFFFFF
##311CA0	1.00	11.64	1.80	11.64
#FFFFFF	11.64	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA4

Deuteranopia (green-blind)

#00339E

Tritanopia (blue-blind)

#00455F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311ca0;
/* rgb */ color: rgb(49, 28, 160);
/* oklch */ color: oklch(36.4% 0.194 277.9);

Tailwind

colors: {
  custom: {
    50: '#7b5dbd',
    500: '#311ca0',
    950: '#000000',
  },
}

SCSS

$custom: #311ca0;
$custom-light: #7b5dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#311ca0",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 160
  },
  "hsl": {
    "h": 249.545,
    "s": 70.213,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36416,
    "c": 0.19433,
    "h": 277.9
  },
  "luminance": 0.04022
}

Semantic roles & 50–950 ramp

primary

#311CA0

secondary

#B2C453

accent

#ED3BD1

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311CA0

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

Preview Lab → · Contrast checker → · Palette generator →