#311F8F#311F8F

#311F8F is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.9% C 0.171 H 280.1°. Best body text is #FFFFFF at 12.19:1 contrast (WCAG AA passes).

Color values

HEX	#311F8F
RGB	rgb(49, 31, 143)
HSL	hsl(250, 64%, 34%)
HSV	hsv(250, 78%, 56%)
CMYK	cmyk(65.7%, 78.3%, 0%, 43.9%)
CIE-LAB	lab(22.36, 41.34, -58.46)
CIE-LCH	lch(22.36, 71.60, 305.27°)
OKLab	oklab(34.9% 0.03 -0.1687)
OKLCH	oklch(34.9% 0.171 280.1)
XYZ	xyz(6.7130, 3.6156, 26.3254)
Luminance	0.0362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F8F #7D8F1F

analogous

#1F458F #311F8F #691F8F

triadic

#311F8F #8F311F #1F8F31

tetradic

#311F8F #8F1F45 #7D8F1F #1F8F69

square

#311F8F #8F1F45 #7D8F1F #1F8F69

split-complementary

#311F8F #8F691F #458F1F

monochromatic

#0F092A #20145D #311F8F #422AC1 #664FD9

Accessibility & contrast

On white

12.19

#311F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#311F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F8F

12.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F8F	#FFFFFF	#000000	##FFFFFF
##311F8F	1.00	12.19	1.72	12.19
#FFFFFF	12.19	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003992

Deuteranopia (green-blind)

#00318D

Tritanopia (blue-blind)

#004056

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #311f8f;
/* rgb */ color: rgb(49, 31, 143);
/* oklch */ color: oklch(34.9% 0.171 280.1);

Tailwind

colors: {
  custom: {
    50: '#775eb1',
    500: '#311f8f',
    950: '#000000',
  },
}

SCSS

$custom: #311f8f;
$custom-light: #775eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#311f8f",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 143
  },
  "hsl": {
    "h": 249.643,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.34896,
    "c": 0.17139,
    "h": 280.1
  },
  "luminance": 0.03616
}

Semantic roles & 50–950 ramp

primary

#311F8F

secondary

#AABC4E

accent

#E740CD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311F8F

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

Preview Lab → · Contrast checker → · Palette generator →