#311EB3#311EB3

#311EB3 is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.8% C 0.215 H 275.4°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#311EB3
RGB	rgb(49, 30, 179)
HSL	hsl(248, 71%, 41%)
HSV	hsv(248, 83%, 70%)
CMYK	cmyk(72.6%, 83.2%, 0%, 29.8%)
CIE-LAB	lab(26.26, 52.82, -73.93)
CIE-LCH	lch(26.26, 90.86, 305.54°)
OKLab	oklab(38.8% 0.0201 -0.2137)
OKLCH	oklch(38.8% 0.215 275.4)
XYZ	xyz(9.8649, 4.8352, 43.0525)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311EB3 #A0B31E

analogous

#1E55B3 #311EB3 #7B1EB3

triadic

#311EB3 #B3311E #1EB331

tetradic

#311EB3 #B31E55 #A0B31E #1EB37B

square

#311EB3 #B31E55 #A0B31E #1EB37B

split-complementary

#311EB3 #B37B1E #55B31E

monochromatic

#140C4A #23157F #311EB3 #4732DD #7666E5

Accessibility & contrast

On white

10.68

#311EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#311EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311EB3

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311EB3	#FFFFFF	#000000	##FFFFFF
##311EB3	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0037B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #311eb3;
/* rgb */ color: rgb(49, 30, 179);
/* oklch */ color: oklch(38.8% 0.215 275.4);

Tailwind

colors: {
  custom: {
    50: '#7f60cb',
    500: '#311eb3',
    950: '#000000',
  },
}

SCSS

$custom: #311eb3;
$custom-light: #7f60cb;
$custom-dark: #000000;

JSON

{
  "hex": "#311eb3",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 179
  },
  "hsl": {
    "h": 247.651,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.38798,
    "c": 0.21466,
    "h": 275.4
  },
  "luminance": 0.04836
}

Semantic roles & 50–950 ramp

primary

#311EB3

secondary

#BDCB62

accent

#EE3AD7

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311EB3

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

Preview Lab → · Contrast checker → · Palette generator →