#311BA7#311BA7

#311BA7 is a dark, highly saturated blue. Relative luminance 0.042; OKLCH L 37.1% C 0.203 H 277.0°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#311BA7
RGB	rgb(49, 27, 167)
HSL	hsl(249, 72%, 38%)
HSV	hsv(249, 84%, 65%)
CMYK	cmyk(70.7%, 83.8%, 0%, 34.5%)
CIE-LAB	lab(24.41, 50.58, -69.79)
CIE-LCH	lch(24.41, 86.19, 305.93°)
OKLab	oklab(37.11% 0.0248 -0.2016)
OKLCH	oklch(37.11% 0.203 277)
XYZ	xyz(8.6313, 4.2261, 36.9126)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311BA7 #91A71B

analogous

#1B4BA7 #311BA7 #771BA7

triadic

#311BA7 #A7311B #1BA731

tetradic

#311BA7 #A71B4B #91A71B #1BA777

square

#311BA7 #A71B4B #91A71B #1BA777

split-complementary

#311BA7 #A7771B #4BA71B

monochromatic

#120A3E #221272 #311BA7 #4124DC #6E58E4

Accessibility & contrast

On white

11.38

#311BA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#311BA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BA7

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311BA7	#FFFFFF	#000000	##FFFFFF
##311BA7	1.00	11.38	1.85	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FAB

Deuteranopia (green-blind)

#0034A5

Tritanopia (blue-blind)

#004863

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #311ba7;
/* rgb */ color: rgb(49, 27, 167);
/* oklch */ color: oklch(37.1% 0.203 277.0);

Tailwind

colors: {
  custom: {
    50: '#7c5dc3',
    500: '#311ba7',
    950: '#000000',
  },
}

SCSS

$custom: #311ba7;
$custom-light: #7c5dc3;
$custom-dark: #000000;

JSON

{
  "hex": "#311ba7",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 167
  },
  "hsl": {
    "h": 249.429,
    "s": 72.165,
    "l": 38.039
  },
  "oklch": {
    "l": 0.37112,
    "c": 0.20317,
    "h": 277
  },
  "luminance": 0.04227
}

Semantic roles & 50–950 ramp

primary

#311BA7

secondary

#B6C856

accent

#EF39D2

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0413

muted

#7C7982

Preview Lab

Preview with #311BA7

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

Preview Lab → · Contrast checker → · Palette generator →