#311BA8#311BA8

#311BA8 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.2% C 0.204 H 276.9°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#311BA8
RGB	rgb(49, 27, 168)
HSL	hsl(249, 72%, 38%)
HSV	hsv(249, 84%, 66%)
CMYK	cmyk(70.8%, 83.9%, 0%, 34.1%)
CIE-LAB	lab(24.52, 50.88, -70.20)
CIE-LCH	lch(24.52, 86.70, 305.93°)
OKLab	oklab(37.23% 0.0245 -0.2028)
OKLCH	oklch(37.23% 0.204 276.9)
XYZ	xyz(8.7241, 4.2632, 37.4013)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311BA8 #92A81B

analogous

#1B4BA8 #311BA8 #771BA8

triadic

#311BA8 #A8311B #1BA831

tetradic

#311BA8 #A81B4B #92A81B #1BA877

square

#311BA8 #A81B4B #92A81B #1BA877

split-complementary

#311BA8 #A8771B #4BA81B

monochromatic

#120A3F #221373 #311BA8 #4124DC #6F59E4

Accessibility & contrast

On white

11.33

#311BA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#311BA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BA8

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311BA8	#FFFFFF	#000000	##FFFFFF
##311BA8	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040AC

Deuteranopia (green-blind)

#0034A6

Tritanopia (blue-blind)

#004864

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #311ba8;
/* rgb */ color: rgb(49, 27, 168);
/* oklch */ color: oklch(37.2% 0.204 276.9);

Tailwind

colors: {
  custom: {
    50: '#7c5dc3',
    500: '#311ba8',
    950: '#000000',
  },
}

SCSS

$custom: #311ba8;
$custom-light: #7c5dc3;
$custom-dark: #000000;

JSON

{
  "hex": "#311ba8",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 168
  },
  "hsl": {
    "h": 249.362,
    "s": 72.308,
    "l": 38.235
  },
  "oklch": {
    "l": 0.37227,
    "c": 0.20431,
    "h": 276.9
  },
  "luminance": 0.04264
}

Semantic roles & 50–950 ramp

primary

#311BA8

secondary

#B6C857

accent

#EF39D3

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #311BA8

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

Preview Lab → · Contrast checker → · Palette generator →