#311BA0#311BA0

#311BA0 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.3% C 0.195 H 278.0°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#311BA0
RGB	rgb(49, 27, 160)
HSL	hsl(250, 71%, 37%)
HSV	hsv(250, 83%, 63%)
CMYK	cmyk(69.4%, 83.1%, 0%, 37.3%)
CIE-LAB	lab(23.59, 48.51, -66.90)
CIE-LCH	lch(23.59, 82.63, 305.95°)
OKLab	oklab(36.31% 0.027 -0.1932)
OKLCH	oklch(36.31% 0.195 278)
XYZ	xyz(8.0017, 3.9742, 33.5963)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311BA0 #8AA01B

analogous

#1B48A0 #311BA0 #741BA0

triadic

#311BA0 #A0311B #1BA031

tetradic

#311BA0 #A01B48 #8AA01B #1BA074

square

#311BA0 #A01B48 #8AA01B #1BA074

split-complementary

#311BA0 #A0741B #48A01B

monochromatic

#110937 #21126C #311BA0 #4124D4 #6B53E2

Accessibility & contrast

On white

11.70

#311BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#311BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BA0

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311BA0	#FFFFFF	#000000	##FFFFFF
##311BA0	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA4

Deuteranopia (green-blind)

#00339E

Tritanopia (blue-blind)

#00455F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311ba0;
/* rgb */ color: rgb(49, 27, 160);
/* oklch */ color: oklch(36.3% 0.195 278.0);

Tailwind

colors: {
  custom: {
    50: '#7b5dbd',
    500: '#311ba0',
    950: '#000000',
  },
}

SCSS

$custom: #311ba0;
$custom-light: #7b5dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#311ba0",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 160
  },
  "hsl": {
    "h": 249.925,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.3631,
    "c": 0.19512,
    "h": 278
  },
  "luminance": 0.03975
}

Semantic roles & 50–950 ramp

primary

#311BA0

secondary

#B2C552

accent

#EE3AD0

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311BA0

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

Preview Lab → · Contrast checker → · Palette generator →