#311DA1#311DA1

#311DA1 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.6% C 0.195 H 277.6°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#311DA1
RGB	rgb(49, 29, 161)
HSL	hsl(249, 69%, 37%)
HSV	hsv(249, 82%, 63%)
CMYK	cmyk(69.6%, 82%, 0%, 36.9%)
CIE-LAB	lab(24.01, 47.90, -66.80)
CIE-LCH	lch(24.01, 82.19, 305.64°)
OKLab	oklab(36.64% 0.0258 -0.193)
OKLCH	oklch(36.64% 0.195 277.6)
XYZ	xyz(8.1369, 4.1042, 34.0747)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311DA1 #8DA11D

analogous

#1D4BA1 #311DA1 #731DA1

triadic

#311DA1 #A1311D #1DA131

tetradic

#311DA1 #A11D4B #8DA11D #1DA173

square

#311DA1 #A11D4B #8DA11D #1DA173

split-complementary

#311DA1 #A1731D #4BA11D

monochromatic

#110A39 #21146D #311DA1 #4126D5 #6C58E1

Accessibility & contrast

On white

11.53

#311DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#311DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311DA1

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311DA1	#FFFFFF	#000000	##FFFFFF
##311DA1	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00349F

Tritanopia (blue-blind)

#004660

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #311da1;
/* rgb */ color: rgb(49, 29, 161);
/* oklch */ color: oklch(36.6% 0.195 277.6);

Tailwind

colors: {
  custom: {
    50: '#7b5ebe',
    500: '#311da1',
    950: '#000000',
  },
}

SCSS

$custom: #311da1;
$custom-light: #7b5ebe;
$custom-dark: #000000;

JSON

{
  "hex": "#311da1",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 161
  },
  "hsl": {
    "h": 249.091,
    "s": 69.474,
    "l": 37.255
  },
  "oklch": {
    "l": 0.36638,
    "c": 0.19471,
    "h": 277.6
  },
  "luminance": 0.04105
}

Semantic roles & 50–950 ramp

primary

#311DA1

secondary

#B4C455

accent

#EC3CD2

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311DA1

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

Preview Lab → · Contrast checker → · Palette generator →