#311DC9#311DC9

#311DC9 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 41.3% C 0.240 H 273.4°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#311DC9
RGB	rgb(49, 29, 201)
HSL	hsl(247, 75%, 45%)
HSV	hsv(247, 86%, 79%)
CMYK	cmyk(75.6%, 85.6%, 0%, 21.2%)
CIE-LAB	lab(28.77, 59.57, -82.78)
CIE-LCH	lch(28.77, 101.99, 305.74°)
OKLab	oklab(41.27% 0.0141 -0.2393)
OKLCH	oklch(41.27% 0.24 273.4)
XYZ	xyz(12.2451, 5.7474, 55.7110)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311DC9 #B5C91D

analogous

#1D5FC9 #311DC9 #871DC9

triadic

#311DC9 #C9311D #1DC931

tetradic

#311DC9 #C91D5F #B5C91D #1DC987

square

#311DC9 #C91D5F #B5C91D #1DC987

split-complementary

#311DC9 #C9871D #5FC91D

monochromatic

#170E5E #241594 #311DC9 #5340E3 #8375EB

Accessibility & contrast

On white

9.77

#311DC9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#311DC9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311DC9

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311DC9	#FFFFFF	#000000	##FFFFFF
##311DC9	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BCD

Deuteranopia (green-blind)

#003CC6

Tritanopia (blue-blind)

#005777

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #311dc9;
/* rgb */ color: rgb(49, 29, 201);
/* oklch */ color: oklch(41.3% 0.240 273.4);

Tailwind

colors: {
  custom: {
    50: '#8461db',
    500: '#311dc9',
    950: '#000000',
  },
}

SCSS

$custom: #311dc9;
$custom-light: #8461db;
$custom-dark: #000000;

JSON

{
  "hex": "#311dc9",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 201
  },
  "hsl": {
    "h": 246.977,
    "s": 74.783,
    "l": 45.098
  },
  "oklch": {
    "l": 0.41274,
    "c": 0.23974,
    "h": 273.4
  },
  "luminance": 0.05749
}

Semantic roles & 50–950 ramp

primary

#311DC9

secondary

#C7D270

accent

#F136DC

background

#F9F6FD

surface

#F1EBFB

border

#CBC6D4

text

#0D0515

muted

#7E7A83

Preview Lab

Preview with #311DC9

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

Preview Lab → · Contrast checker → · Palette generator →