#311D9C#311D9C

#311D9C is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.1% C 0.189 H 278.3°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#311D9C
RGB	rgb(49, 29, 156)
HSL	hsl(249, 69%, 36%)
HSV	hsv(249, 81%, 61%)
CMYK	cmyk(68.6%, 81.4%, 0%, 38.8%)
CIE-LAB	lab(23.44, 46.38, -64.69)
CIE-LCH	lch(23.44, 79.60, 305.64°)
OKLab	oklab(36.08% 0.0273 -0.1868)
OKLCH	oklch(36.08% 0.189 278.3)
XYZ	xyz(7.7048, 3.9313, 31.7988)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D9C #889C1D

analogous

#1D499C #311D9C #711D9C

triadic

#311D9C #9C311D #1D9C31

tetradic

#311D9C #9C1D49 #889C1D #1D9C71

square

#311D9C #9C1D49 #889C1D #1D9C71

split-complementary

#311D9C #9C711D #499C1D

monochromatic

#110A35 #211368 #311D9C #4127D0 #6A54DF

Accessibility & contrast

On white

11.76

#311D9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#311D9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D9C

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D9C	#FFFFFF	#000000	##FFFFFF
##311D9C	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9F

Deuteranopia (green-blind)

#00339A

Tritanopia (blue-blind)

#00445D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311d9c;
/* rgb */ color: rgb(49, 29, 156);
/* oklch */ color: oklch(36.1% 0.189 278.3);

Tailwind

colors: {
  custom: {
    50: '#7a5dbb',
    500: '#311d9c',
    950: '#000000',
  },
}

SCSS

$custom: #311d9c;
$custom-light: #7a5dbb;
$custom-dark: #000000;

JSON

{
  "hex": "#311d9c",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 156
  },
  "hsl": {
    "h": 249.449,
    "s": 68.649,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36077,
    "c": 0.18884,
    "h": 278.3
  },
  "luminance": 0.03932
}

Semantic roles & 50–950 ramp

primary

#311D9C

secondary

#B1C252

accent

#EB3CD0

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311D9C

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

Preview Lab → · Contrast checker → · Palette generator →