#311CA9#311CA9

#311CA9 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.4% C 0.205 H 276.7°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#311CA9
RGB	rgb(49, 28, 169)
HSL	hsl(249, 72%, 39%)
HSV	hsv(249, 83%, 66%)
CMYK	cmyk(71%, 83.4%, 0%, 33.7%)
CIE-LAB	lab(24.79, 50.74, -70.37)
CIE-LCH	lch(24.79, 86.75, 305.79°)
OKLab	oklab(37.44% 0.0238 -0.2033)
OKLCH	oklch(37.44% 0.205 276.7)
XYZ	xyz(8.8410, 4.3472, 37.9016)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311CA9 #94A91C

analogous

#1C4DA9 #311CA9 #771CA9

triadic

#311CA9 #A9311C #1CA931

tetradic

#311CA9 #A91C4D #94A91C #1CA977

square

#311CA9 #A91C4D #94A91C #1CA977

split-complementary

#311CA9 #A9771C #4DA91C

monochromatic

#130B40 #221374 #311CA9 #4227DB #705BE4

Accessibility & contrast

On white

11.23

#311CA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#311CA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311CA9

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311CA9	#FFFFFF	#000000	##FFFFFF
##311CA9	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040AD

Deuteranopia (green-blind)

#0035A7

Tritanopia (blue-blind)

#004964

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #311ca9;
/* rgb */ color: rgb(49, 28, 169);
/* oklch */ color: oklch(37.4% 0.205 276.7);

Tailwind

colors: {
  custom: {
    50: '#7d5ec4',
    500: '#311ca9',
    950: '#000000',
  },
}

SCSS

$custom: #311ca9;
$custom-light: #7d5ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#311ca9",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 169
  },
  "hsl": {
    "h": 248.936,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.37443,
    "c": 0.20472,
    "h": 276.7
  },
  "luminance": 0.04348
}

Semantic roles & 50–950 ramp

primary

#311CA9

secondary

#B7C859

accent

#EE39D3

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #311CA9

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

Preview Lab → · Contrast checker → · Palette generator →