#311E9A#311E9A

#311E9A is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.0% C 0.186 H 278.5°. Best body text is #FFFFFF at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#311E9A
RGB	rgb(49, 30, 154)
HSL	hsl(249, 67%, 36%)
HSV	hsv(249, 81%, 60%)
CMYK	cmyk(68.2%, 80.5%, 0%, 39.6%)
CIE-LAB	lab(23.39, 45.28, -63.56)
CIE-LCH	lch(23.39, 78.04, 305.47°)
OKLab	oklab(35.97% 0.0274 -0.1836)
OKLCH	oklch(35.97% 0.186 278.5)
XYZ	xyz(7.5618, 3.9140, 30.9226)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311E9A #879A1E

analogous

#1E499A #311E9A #6F1E9A

triadic

#311E9A #9A311E #1E9A31

tetradic

#311E9A #9A1E49 #879A1E #1E9A6F

square

#311E9A #9A1E49 #879A1E #1E9A6F

split-complementary

#311E9A #9A6F1E #499A1E

monochromatic

#100A34 #211467 #311E9A #4128CD #6A55DE

Accessibility & contrast

On white

11.78

#311E9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#311E9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311E9A

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311E9A	#FFFFFF	#000000	##FFFFFF
##311E9A	1.00	11.78	1.78	11.78
#FFFFFF	11.78	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9D

Deuteranopia (green-blind)

#003398

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311e9a;
/* rgb */ color: rgb(49, 30, 154);
/* oklch */ color: oklch(36.0% 0.186 278.5);

Tailwind

colors: {
  custom: {
    50: '#795eb9',
    500: '#311e9a',
    950: '#000000',
  },
}

SCSS

$custom: #311e9a;
$custom-light: #795eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#311e9a",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 154
  },
  "hsl": {
    "h": 249.194,
    "s": 67.391,
    "l": 36.078
  },
  "oklch": {
    "l": 0.3597,
    "c": 0.18562,
    "h": 278.5
  },
  "luminance": 0.03915
}

Semantic roles & 50–950 ramp

primary

#311E9A

secondary

#B0C153

accent

#EA3ED0

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #311E9A

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

Preview Lab → · Contrast checker → · Palette generator →