#311C9D#311C9D

#311C9D is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.1% C 0.191 H 278.3°. Best body text is #FFFFFF at 11.77:1 contrast (WCAG AA passes).

Color values

HEX	#311C9D
RGB	rgb(49, 28, 157)
HSL	hsl(250, 70%, 36%)
HSV	hsv(250, 82%, 62%)
CMYK	cmyk(68.8%, 82.2%, 0%, 38.4%)
CIE-LAB	lab(23.40, 47.15, -65.38)
CIE-LCH	lch(23.40, 80.61, 305.80°)
OKLab	oklab(36.08% 0.0275 -0.1888)
OKLCH	oklch(36.08% 0.191 278.3)
XYZ	xyz(7.7657, 3.9171, 32.2386)
Luminance	0.0392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311C9D #889D1C

analogous

#1C489D #311C9D #721C9D

triadic

#311C9D #9D311C #1C9D31

tetradic

#311C9D #9D1C48 #889D1C #1C9D72

square

#311C9D #9D1C48 #889D1C #1C9D72

split-complementary

#311C9D #9D721C #489D1C

monochromatic

#110935 #211369 #311C9D #4125D1 #6A53E0

Accessibility & contrast

On white

11.77

#311C9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#311C9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311C9D

11.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311C9D	#FFFFFF	#000000	##FFFFFF
##311C9D	1.00	11.77	1.78	11.77
#FFFFFF	11.77	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA1

Deuteranopia (green-blind)

#00329B

Tritanopia (blue-blind)

#00445D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311c9d;
/* rgb */ color: rgb(49, 28, 157);
/* oklch */ color: oklch(36.1% 0.191 278.3);

Tailwind

colors: {
  custom: {
    50: '#7a5dbb',
    500: '#311c9d',
    950: '#000000',
  },
}

SCSS

$custom: #311c9d;
$custom-light: #7a5dbb;
$custom-dark: #000000;

JSON

{
  "hex": "#311c9d",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 157
  },
  "hsl": {
    "h": 249.767,
    "s": 69.73,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36077,
    "c": 0.19084,
    "h": 278.3
  },
  "luminance": 0.03918
}

Semantic roles & 50–950 ramp

primary

#311C9D

secondary

#B1C351

accent

#ED3BD0

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311C9D

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

Preview Lab → · Contrast checker → · Palette generator →