#311D9F#311D9F

#311D9F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.4% C 0.192 H 277.9°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#311D9F
RGB	rgb(49, 29, 159)
HSL	hsl(249, 69%, 37%)
HSV	hsv(249, 82%, 62%)
CMYK	cmyk(69.2%, 81.8%, 0%, 37.6%)
CIE-LAB	lab(23.78, 47.29, -65.96)
CIE-LCH	lch(23.78, 81.16, 305.64°)
OKLab	oklab(36.41% 0.0264 -0.1905)
OKLCH	oklch(36.41% 0.192 277.9)
XYZ	xyz(7.9620, 4.0342, 33.1533)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D9F #8B9F1D

analogous

#1D4A9F #311D9F #721D9F

triadic

#311D9F #9F311D #1D9F31

tetradic

#311D9F #9F1D4A #8B9F1D #1D9F72

square

#311D9F #9F1D4A #8B9F1D #1D9F72

split-complementary

#311D9F #9F721D #4A9F1D

monochromatic

#110A37 #21146B #311D9F #4126D3 #6B56E0

Accessibility & contrast

On white

11.62

#311D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#311D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D9F

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D9F	#FFFFFF	#000000	##FFFFFF
##311D9F	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA3

Deuteranopia (green-blind)

#00339D

Tritanopia (blue-blind)

#00455F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #311d9f;
/* rgb */ color: rgb(49, 29, 159);
/* oklch */ color: oklch(36.4% 0.192 277.9);

Tailwind

colors: {
  custom: {
    50: '#7a5ebd',
    500: '#311d9f',
    950: '#000000',
  },
}

SCSS

$custom: #311d9f;
$custom-light: #7a5ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#311d9f",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 159
  },
  "hsl": {
    "h": 249.231,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36413,
    "c": 0.19237,
    "h": 277.9
  },
  "luminance": 0.04035
}

Semantic roles & 50–950 ramp

primary

#311D9F

secondary

#B2C454

accent

#EC3CD1

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311D9F

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

Preview Lab → · Contrast checker → · Palette generator →