#311FA0#311FA0

#311FA0 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.8% C 0.192 H 277.6°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#311FA0
RGB	rgb(49, 31, 160)
HSL	hsl(248, 68%, 37%)
HSV	hsv(248, 81%, 63%)
CMYK	cmyk(69.4%, 80.6%, 0%, 37.3%)
CIE-LAB	lab(24.23, 46.64, -65.83)
CIE-LCH	lch(24.23, 80.68, 305.31°)
OKLab	oklab(36.75% 0.0252 -0.1902)
OKLCH	oklch(36.75% 0.192 277.6)
XYZ	xyz(8.0997, 4.1703, 33.6290)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FA0 #8EA01F

analogous

#1F4EA0 #311FA0 #711FA0

triadic

#311FA0 #A0311F #1FA031

tetradic

#311FA0 #A01F4E #8EA01F #1FA071

square

#311FA0 #A01F4E #8EA01F #1FA071

split-complementary

#311FA0 #A0711F #4EA01F

monochromatic

#120B39 #21156D #311FA0 #4129D3 #6D5ADF

Accessibility & contrast

On white

11.45

#311FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#311FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FA0

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FA0	#FFFFFF	#000000	##FFFFFF
##311FA0	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA4

Deuteranopia (green-blind)

#00349E

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #311fa0;
/* rgb */ color: rgb(49, 31, 160);
/* oklch */ color: oklch(36.8% 0.192 277.6);

Tailwind

colors: {
  custom: {
    50: '#7a5fbd',
    500: '#311fa0',
    950: '#000000',
  },
}

SCSS

$custom: #311fa0;
$custom-light: #7a5fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#311fa0",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 160
  },
  "hsl": {
    "h": 248.372,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.36753,
    "c": 0.19188,
    "h": 277.6
  },
  "luminance": 0.04171
}

Semantic roles & 50–950 ramp

primary

#311FA0

secondary

#B4C358

accent

#EA3DD2

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311FA0

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

Preview Lab → · Contrast checker → · Palette generator →