#311F91#311F91

#311F91 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.1% C 0.174 H 279.7°. Best body text is #FFFFFF at 12.10:1 contrast (WCAG AA passes).

Color values

HEX	#311F91
RGB	rgb(49, 31, 145)
HSL	hsl(249, 65%, 35%)
HSV	hsv(249, 79%, 57%)
CMYK	cmyk(66.2%, 78.6%, 0%, 43.1%)
CIE-LAB	lab(22.57, 41.97, -59.35)
CIE-LCH	lch(22.57, 72.69, 305.27°)
OKLab	oklab(35.11% 0.0294 -0.1713)
OKLCH	oklch(35.11% 0.174 279.7)
XYZ	xyz(6.8658, 3.6767, 27.1304)
Luminance	0.0368 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F91 #7F911F

analogous

#1F4691 #311F91 #6A1F91

triadic

#311F91 #91311F #1F9131

tetradic

#311F91 #911F46 #7F911F #1F916A

square

#311F91 #911F46 #7F911F #1F916A

split-complementary

#311F91 #916A1F #46911F

monochromatic

#0F092C #20145F #311F91 #422AC3 #6651DA

Accessibility & contrast

On white

12.10

#311F91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#311F91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F91

12.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F91	#FFFFFF	#000000	##FFFFFF
##311F91	1.00	12.10	1.74	12.10
#FFFFFF	12.10	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A94

Deuteranopia (green-blind)

#00318F

Tritanopia (blue-blind)

#004157

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #311f91;
/* rgb */ color: rgb(49, 31, 145);
/* oklch */ color: oklch(35.1% 0.174 279.7);

Tailwind

colors: {
  custom: {
    50: '#775eb2',
    500: '#311f91',
    950: '#000000',
  },
}

SCSS

$custom: #311f91;
$custom-light: #775eb2;
$custom-dark: #000000;

JSON

{
  "hex": "#311f91",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 145
  },
  "hsl": {
    "h": 249.474,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.3511,
    "c": 0.17385,
    "h": 279.7
  },
  "luminance": 0.03677
}

Semantic roles & 50–950 ramp

primary

#311F91

secondary

#ABBD4F

accent

#E840CD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311F91

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

Preview Lab → · Contrast checker → · Palette generator →