#5151E7#5151E7

#5151E7 is a mid, highly saturated blue. Relative luminance 0.134; OKLCH L 53.0% C 0.220 H 275.9°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#5151E7
RGB	rgb(81, 81, 231)
HSL	hsl(240, 76%, 61%)
HSV	hsv(240, 65%, 91%)
CMYK	cmyk(64.9%, 64.9%, 0%, 9.4%)
CIE-LAB	lab(43.36, 45.22, -75.90)
CIE-LCH	lch(43.36, 88.35, 300.78°)
OKLab	oklab(53.04% 0.0225 -0.219)
OKLCH	oklch(53.04% 0.22 275.9)
XYZ	xyz(20.7548, 13.4019, 77.0789)
Luminance	0.1340 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E7 #E7E751

analogous

#519CE7 #5151E7 #9C51E7

triadic

#5151E7 #E75151 #51E751

tetradic

#5151E7 #E7519C #E7E751 #51E79C

square

#5151E7 #E7519C #E7E751 #51E79C

split-complementary

#5151E7 #E79C51 #9CE751

monochromatic

#1717A7 #1E1EDC #5151E7 #8787EE #BDBDF6

Accessibility & contrast

On white

5.71

#5151E7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#5151E7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E7

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E7	#FFFFFF	#000000	##FFFFFF
##5151E7	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DEC

Deuteranopia (green-blind)

#0060E4

Tritanopia (blue-blind)

#007895

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5151e7;
/* rgb */ color: rgb(81, 81, 231);
/* oklch */ color: oklch(53.0% 0.220 275.9);

Tailwind

colors: {
  custom: {
    50: '#9382f0',
    500: '#5151e7',
    950: '#000000',
  },
}

SCSS

$custom: #5151e7;
$custom-light: #9382f0;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e7",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 231
  },
  "hsl": {
    "h": 240,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.53044,
    "c": 0.22012,
    "h": 275.9
  },
  "luminance": 0.13404
}

Semantic roles & 50–950 ramp

primary

#5151E7

secondary

#E6E6AE

accent

#D80ED8

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0F0A17

muted

#7E7C85

Preview Lab

Preview with #5151E7

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

Preview Lab → · Contrast checker → · Palette generator →