#311C9F#311C9F

#311C9F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.3% C 0.193 H 278.0°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#311C9F
RGB	rgb(49, 28, 159)
HSL	hsl(250, 70%, 37%)
HSV	hsv(250, 82%, 62%)
CMYK	cmyk(69.2%, 82.4%, 0%, 37.6%)
CIE-LAB	lab(23.63, 47.76, -66.22)
CIE-LCH	lch(23.63, 81.64, 305.80°)
OKLab	oklab(36.3% 0.0269 -0.1913)
OKLCH	oklch(36.3% 0.193 278)
XYZ	xyz(7.9379, 3.9860, 33.1452)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311C9F #8A9F1C

analogous

#1C499F #311C9F #731C9F

triadic

#311C9F #9F311C #1C9F31

tetradic

#311C9F #9F1C49 #8A9F1C #1C9F73

square

#311C9F #9F1C49 #8A9F1C #1C9F73

split-complementary

#311C9F #9F731C #499F1C

monochromatic

#110A37 #21136B #311C9F #4125D3 #6B54E1

Accessibility & contrast

On white

11.68

#311C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#311C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311C9F

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311C9F	#FFFFFF	#000000	##FFFFFF
##311C9F	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA3

Deuteranopia (green-blind)

#00339D

Tritanopia (blue-blind)

#00455F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311c9f;
/* rgb */ color: rgb(49, 28, 159);
/* oklch */ color: oklch(36.3% 0.193 278.0);

Tailwind

colors: {
  custom: {
    50: '#7a5dbd',
    500: '#311c9f',
    950: '#000000',
  },
}

SCSS

$custom: #311c9f;
$custom-light: #7a5dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#311c9f",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 159
  },
  "hsl": {
    "h": 249.618,
    "s": 70.053,
    "l": 36.667
  },
  "oklch": {
    "l": 0.36303,
    "c": 0.19318,
    "h": 278
  },
  "luminance": 0.03987
}

Semantic roles & 50–950 ramp

primary

#311C9F

secondary

#B2C453

accent

#ED3BD0

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311C9F

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

Preview Lab → · Contrast checker → · Palette generator →