#5151E4#5151E4

#5151E4 is a mid, highly saturated blue. Relative luminance 0.132; OKLCH L 52.8% C 0.216 H 276.0°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#5151E4
RGB	rgb(81, 81, 228)
HSL	hsl(240, 73%, 61%)
HSV	hsv(240, 64%, 89%)
CMYK	cmyk(64.5%, 64.5%, 0%, 10.6%)
CIE-LAB	lab(43.11, 44.25, -74.60)
CIE-LCH	lch(43.11, 86.74, 300.67°)
OKLab	oklab(52.79% 0.0227 -0.2152)
OKLCH	oklch(52.79% 0.216 276)
XYZ	xyz(20.3348, 13.2339, 74.8665)
Luminance	0.1324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E4 #E4E451

analogous

#519AE4 #5151E4 #9A51E4

triadic

#5151E4 #E45151 #51E451

tetradic

#5151E4 #E4519A #E4E451 #51E49A

square

#5151E4 #E4519A #E4E451 #51E49A

split-complementary

#5151E4 #E49A51 #9AE451

monochromatic

#1919A2 #2121D7 #5151E4 #8686EC #BBBBF4

Accessibility & contrast

On white

5.76

#5151E4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#5151E4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E4

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E4	#FFFFFF	#000000	##FFFFFF
##5151E4	1.00	5.76	3.65	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CE9

Deuteranopia (green-blind)

#005FE1

Tritanopia (blue-blind)

#007793

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5151e4;
/* rgb */ color: rgb(81, 81, 228);
/* oklch */ color: oklch(52.8% 0.216 276.0);

Tailwind

colors: {
  custom: {
    50: '#9282ee',
    500: '#5151e4',
    950: '#000000',
  },
}

SCSS

$custom: #5151e4;
$custom-light: #9282ee;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e4",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 228
  },
  "hsl": {
    "h": 240,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.52786,
    "c": 0.21638,
    "h": 276
  },
  "luminance": 0.13236
}

Semantic roles & 50–950 ramp

primary

#5151E4

secondary

#E4E4AC

accent

#D510D5

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151E4

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

Preview Lab → · Contrast checker → · Palette generator →