#311FB3#311FB3

#311FB3 is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 38.9% C 0.214 H 275.3°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#311FB3
RGB	rgb(49, 31, 179)
HSL	hsl(247, 70%, 41%)
HSV	hsv(247, 83%, 70%)
CMYK	cmyk(72.6%, 82.7%, 0%, 29.8%)
CIE-LAB	lab(26.41, 52.38, -73.68)
CIE-LCH	lch(26.41, 90.41, 305.41°)
OKLab	oklab(38.9% 0.0198 -0.213)
OKLCH	oklch(38.9% 0.214 275.3)
XYZ	xyz(9.8906, 4.8866, 43.0611)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FB3 #A1B31F

analogous

#1F57B3 #311FB3 #7B1FB3

triadic

#311FB3 #B3311F #1FB331

tetradic

#311FB3 #B31F57 #A1B31F #1FB37B

square

#311FB3 #B31F57 #A1B31F #1FB37B

split-complementary

#311FB3 #B37B1F #57B31F

monochromatic

#140D4B #23167F #311FB3 #4833DC #7768E5

Accessibility & contrast

On white

10.62

#311FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#311FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FB3

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FB3	#FFFFFF	#000000	##FFFFFF
##311FB3	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B7

Deuteranopia (green-blind)

#0038B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #311fb3;
/* rgb */ color: rgb(49, 31, 179);
/* oklch */ color: oklch(38.9% 0.214 275.3);

Tailwind

colors: {
  custom: {
    50: '#7f60cb',
    500: '#311fb3',
    950: '#000000',
  },
}

SCSS

$custom: #311fb3;
$custom-light: #7f60cb;
$custom-dark: #000000;

JSON

{
  "hex": "#311fb3",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 179
  },
  "hsl": {
    "h": 247.297,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.38901,
    "c": 0.21393,
    "h": 275.3
  },
  "luminance": 0.04888
}

Semantic roles & 50–950 ramp

primary

#311FB3

secondary

#BECA64

accent

#ED3BD8

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311FB3

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

Preview Lab → · Contrast checker → · Palette generator →