#311DA0#311DA0

#311DA0 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.5% C 0.194 H 277.8°. Best body text is #FFFFFF at 11.58:1 contrast (WCAG AA passes).

Color values

HEX	#311DA0
RGB	rgb(49, 29, 160)
HSL	hsl(249, 69%, 37%)
HSV	hsv(249, 82%, 63%)
CMYK	cmyk(69.4%, 81.9%, 0%, 37.3%)
CIE-LAB	lab(23.90, 47.59, -66.38)
CIE-LCH	lch(23.90, 81.68, 305.64°)
OKLab	oklab(36.53% 0.0261 -0.1918)
OKLCH	oklch(36.53% 0.194 277.8)
XYZ	xyz(8.0491, 4.0690, 33.6121)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311DA0 #8CA01D

analogous

#1D4BA0 #311DA0 #721DA0

triadic

#311DA0 #A0311D #1DA031

tetradic

#311DA0 #A01D4B #8CA01D #1DA072

square

#311DA0 #A01D4B #8CA01D #1DA072

split-complementary

#311DA0 #A0721D #4BA01D

monochromatic

#110A38 #21146C #311DA0 #4126D4 #6C57E1

Accessibility & contrast

On white

11.58

#311DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#311DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311DA0

11.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311DA0	#FFFFFF	#000000	##FFFFFF
##311DA0	1.00	11.58	1.81	11.58
#FFFFFF	11.58	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA4

Deuteranopia (green-blind)

#00339E

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #311da0;
/* rgb */ color: rgb(49, 29, 160);
/* oklch */ color: oklch(36.5% 0.194 277.8);

Tailwind

colors: {
  custom: {
    50: '#7a5ebd',
    500: '#311da0',
    950: '#000000',
  },
}

SCSS

$custom: #311da0;
$custom-light: #7a5ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#311da0",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 160
  },
  "hsl": {
    "h": 249.16,
    "s": 69.312,
    "l": 37.059
  },
  "oklch": {
    "l": 0.36525,
    "c": 0.19354,
    "h": 277.8
  },
  "luminance": 0.0407
}

Semantic roles & 50–950 ramp

primary

#311DA0

secondary

#B3C455

accent

#EC3CD1

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311DA0

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

Preview Lab → · Contrast checker → · Palette generator →