#311B74#311B74

#311B74 is a dark, vivid violet. Relative luminance 0.027; OKLCH L 31.5% C 0.142 H 286.4°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#311B74
RGB	rgb(49, 27, 116)
HSL	hsl(255, 62%, 28%)
HSV	hsv(255, 77%, 45%)
CMYK	cmyk(57.8%, 76.7%, 0%, 54.5%)
CIE-LAB	lab(18.79, 34.99, -47.26)
CIE-LCH	lch(18.79, 58.80, 306.51°)
OKLab	oklab(31.54% 0.04 -0.136)
OKLCH	oklch(31.54% 0.142 286.4)
XYZ	xyz(4.8100, 2.6975, 16.7868)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B74 #5E741B

analogous

#1B3274 #311B74 #5D1B74

triadic

#311B74 #74311B #1B7431

tetradic

#311B74 #741B32 #5E741B #1B745D

square

#311B74 #741B32 #5E741B #1B745D

split-complementary

#311B74 #745D1B #32741B

monochromatic

#0A0619 #1C0F42 #311B74 #4627A6 #5E39D1

Accessibility & contrast

On white

13.64

#311B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#311B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B74

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B74	#FFFFFF	#000000	##FFFFFF
##311B74	1.00	13.64	1.54	13.64
#FFFFFF	13.64	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003077

Deuteranopia (green-blind)

#002B72

Tritanopia (blue-blind)

#133346

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #311b74;
/* rgb */ color: rgb(49, 27, 116);
/* oklch */ color: oklch(31.5% 0.142 286.4);

Tailwind

colors: {
  custom: {
    50: '#725a9d',
    500: '#311b74',
    950: '#000000',
  },
}

SCSS

$custom: #311b74;
$custom-light: #725a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#311b74",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 116
  },
  "hsl": {
    "h": 254.831,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3154,
    "c": 0.14176,
    "h": 286.4
  },
  "luminance": 0.02698
}

Semantic roles & 50–950 ramp

primary

#311B74

secondary

#8FA942

accent

#E542BD

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #311B74

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

Preview Lab → · Contrast checker → · Palette generator →