#5151E0#5151E0

#5151E0 is a mid, highly saturated blue. Relative luminance 0.130; OKLCH L 52.4% C 0.211 H 276.3°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#5151E0
RGB	rgb(81, 81, 224)
HSL	hsl(240, 70%, 60%)
HSV	hsv(240, 64%, 88%)
CMYK	cmyk(63.8%, 63.8%, 0%, 12.2%)
CIE-LAB	lab(42.78, 42.95, -72.87)
CIE-LCH	lch(42.78, 84.58, 300.51°)
OKLab	oklab(52.45% 0.0231 -0.2101)
OKLCH	oklch(52.45% 0.211 276.3)
XYZ	xyz(19.7859, 13.0144, 71.9759)
Luminance	0.1302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E0 #E0E051

analogous

#5199E0 #5151E0 #9951E0

triadic

#5151E0 #E05151 #51E051

tetradic

#5151E0 #E05199 #E0E051 #51E099

square

#5151E0 #E05199 #E0E051 #51E099

split-complementary

#5151E0 #E09951 #99E051

monochromatic

#1C1C9B #2525CF #5151E0 #8585E9 #B9B9F3

Accessibility & contrast

On white

5.83

#5151E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#5151E0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E0

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E0	#FFFFFF	#000000	##FFFFFF
##5151E0	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BE5

Deuteranopia (green-blind)

#005FDD

Tritanopia (blue-blind)

#007691

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #5151e0;
/* rgb */ color: rgb(81, 81, 224);
/* oklch */ color: oklch(52.4% 0.211 276.3);

Tailwind

colors: {
  custom: {
    50: '#9182eb',
    500: '#5151e0',
    950: '#000000',
  },
}

SCSS

$custom: #5151e0;
$custom-light: #9182eb;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e0",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 224
  },
  "hsl": {
    "h": 240,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.52445,
    "c": 0.21135,
    "h": 276.3
  },
  "luminance": 0.13016
}

Semantic roles & 50–950 ramp

primary

#5151E0

secondary

#E2E2AB

accent

#ED3BED

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151E0

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

Preview Lab → · Contrast checker → · Palette generator →