#311CB4#311CB4

#311CB4 is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.7% C 0.217 H 275.4°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#311CB4
RGB	rgb(49, 28, 180)
HSL	hsl(248, 73%, 41%)
HSV	hsv(248, 84%, 71%)
CMYK	cmyk(72.8%, 84.4%, 0%, 29.4%)
CIE-LAB	lab(26.09, 53.96, -74.81)
CIE-LCH	lch(26.09, 92.24, 305.80°)
OKLab	oklab(38.72% 0.0205 -0.2162)
OKLCH	oklch(38.72% 0.217 275.4)
XYZ	xyz(9.9174, 4.7778, 43.5707)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CB4 #9FB41C

analogous

#1C53B4 #311CB4 #7D1CB4

triadic

#311CB4 #B4311C #1CB431

tetradic

#311CB4 #B41C53 #9FB41C #1CB47D

square

#311CB4 #B41C53 #9FB41C #1CB47D

split-complementary

#311CB4 #B47D1C #53B41C

monochromatic

#140C4A #23147F #311CB4 #472FDF #7664E7

Accessibility & contrast

On white

10.74

#311CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#311CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CB4

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CB4	#FFFFFF	#000000	##FFFFFF
##311CB4	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B8

Deuteranopia (green-blind)

#0037B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #311cb4;
/* rgb */ color: rgb(49, 28, 180);
/* oklch */ color: oklch(38.7% 0.217 275.4);

Tailwind

colors: {
  custom: {
    50: '#7f5fcc',
    500: '#311cb4',
    950: '#000000',
  },
}

SCSS

$custom: #311cb4;
$custom-light: #7f5fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#311cb4",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 180
  },
  "hsl": {
    "h": 248.289,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38716,
    "c": 0.21719,
    "h": 275.4
  },
  "luminance": 0.04779
}

Semantic roles & 50–950 ramp

primary

#311CB4

secondary

#BDCC60

accent

#F038D6

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311CB4

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

Preview Lab → · Contrast checker → · Palette generator →