#311EA5#311EA5

#311EA5 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 37.2% C 0.199 H 277.0°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#311EA5
RGB	rgb(49, 30, 165)
HSL	hsl(248, 69%, 38%)
HSV	hsv(248, 82%, 65%)
CMYK	cmyk(70.3%, 81.8%, 0%, 35.3%)
CIE-LAB	lab(24.63, 48.64, -68.21)
CIE-LCH	lch(24.63, 83.77, 305.49°)
OKLab	oklab(37.2% 0.0242 -0.1971)
OKLCH	oklch(37.2% 0.199 277)
XYZ	xyz(8.5202, 4.2973, 35.9705)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311EA5 #92A51E

analogous

#1E4FA5 #311EA5 #741EA5

triadic

#311EA5 #A5311E #1EA531

tetradic

#311EA5 #A51E4F #92A51E #1EA574

square

#311EA5 #A51E4F #92A51E #1EA574

split-complementary

#311EA5 #A5741E #4FA51E

monochromatic

#120B3D #221571 #311EA5 #4128D8 #6F5CE1

Accessibility & contrast

On white

11.29

#311EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#311EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311EA5

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311EA5	#FFFFFF	#000000	##FFFFFF
##311EA5	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040A9

Deuteranopia (green-blind)

#0035A3

Tritanopia (blue-blind)

#004863

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #311ea5;
/* rgb */ color: rgb(49, 30, 165);
/* oklch */ color: oklch(37.2% 0.199 277.0);

Tailwind

colors: {
  custom: {
    50: '#7c5fc1',
    500: '#311ea5',
    950: '#000000',
  },
}

SCSS

$custom: #311ea5;
$custom-light: #7c5fc1;
$custom-dark: #000000;

JSON

{
  "hex": "#311ea5",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 165
  },
  "hsl": {
    "h": 248.444,
    "s": 69.231,
    "l": 38.235
  },
  "oklch": {
    "l": 0.372,
    "c": 0.19857,
    "h": 277
  },
  "luminance": 0.04298
}

Semantic roles & 50–950 ramp

primary

#311EA5

secondary

#B6C559

accent

#EC3CD3

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311EA5

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

Preview Lab → · Contrast checker → · Palette generator →