#311FB4#311FB4

#311FB4 is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 39.0% C 0.215 H 275.2°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#311FB4
RGB	rgb(49, 31, 180)
HSL	hsl(247, 71%, 41%)
HSV	hsv(247, 83%, 71%)
CMYK	cmyk(72.8%, 82.8%, 0%, 29.4%)
CIE-LAB	lab(26.53, 52.68, -74.09)
CIE-LCH	lch(26.53, 90.91, 305.41°)
OKLab	oklab(39.02% 0.0195 -0.2142)
OKLCH	oklch(39.02% 0.215 275.2)
XYZ	xyz(9.9921, 4.9272, 43.5956)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FB4 #A2B41F

analogous

#1F58B4 #311FB4 #7C1FB4

triadic

#311FB4 #B4311F #1FB431

tetradic

#311FB4 #B41F58 #A2B41F #1FB47C

square

#311FB4 #B41F58 #A2B41F #1FB47C

split-complementary

#311FB4 #B47C1F #58B41F

monochromatic

#150D4C #231680 #311FB4 #4834DC #7768E5

Accessibility & contrast

On white

10.58

#311FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#311FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FB4

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FB4	#FFFFFF	#000000	##FFFFFF
##311FB4	1.00	10.58	1.99	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B8

Deuteranopia (green-blind)

#0038B2

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #311fb4;
/* rgb */ color: rgb(49, 31, 180);
/* oklch */ color: oklch(39.0% 0.215 275.2);

Tailwind

colors: {
  custom: {
    50: '#7f60cc',
    500: '#311fb4',
    950: '#000000',
  },
}

SCSS

$custom: #311fb4;
$custom-light: #7f60cc;
$custom-dark: #000000;

JSON

{
  "hex": "#311fb4",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 180
  },
  "hsl": {
    "h": 247.248,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.39015,
    "c": 0.21507,
    "h": 275.2
  },
  "luminance": 0.04928
}

Semantic roles & 50–950 ramp

primary

#311FB4

secondary

#BECB64

accent

#ED3AD8

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311FB4

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

Preview Lab → · Contrast checker → · Palette generator →