#5151E1#5151E1

#5151E1 is a mid, highly saturated blue. Relative luminance 0.131; OKLCH L 52.5% C 0.213 H 276.2°. Best body text is #FFFFFF at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#5151E1
RGB	rgb(81, 81, 225)
HSL	hsl(240, 71%, 60%)
HSV	hsv(240, 64%, 88%)
CMYK	cmyk(64%, 64%, 0%, 11.8%)
CIE-LAB	lab(42.87, 43.27, -73.30)
CIE-LCH	lch(42.87, 85.12, 300.55°)
OKLab	oklab(52.53% 0.023 -0.2114)
OKLCH	oklch(52.53% 0.213 276.2)
XYZ	xyz(19.9219, 13.0688, 72.6922)
Luminance	0.1307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E1 #E1E151

analogous

#5199E1 #5151E1 #9951E1

triadic

#5151E1 #E15151 #51E151

tetradic

#5151E1 #E15199 #E1E151 #51E199

square

#5151E1 #E15199 #E1E151 #51E199

split-complementary

#5151E1 #E19951 #99E151

monochromatic

#1B1B9D #2424D1 #5151E1 #8585EA #B9B9F3

Accessibility & contrast

On white

5.81

#5151E1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#5151E1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E1

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E1	#FFFFFF	#000000	##FFFFFF
##5151E1	1.00	5.81	3.61	5.81
#FFFFFF	5.81	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CE6

Deuteranopia (green-blind)

#005FDE

Tritanopia (blue-blind)

#007692

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #5151e1;
/* rgb */ color: rgb(81, 81, 225);
/* oklch */ color: oklch(52.5% 0.213 276.2);

Tailwind

colors: {
  custom: {
    50: '#9282eb',
    500: '#5151e1',
    950: '#000000',
  },
}

SCSS

$custom: #5151e1;
$custom-light: #9282eb;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e1",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 225
  },
  "hsl": {
    "h": 240,
    "s": 70.588,
    "l": 60
  },
  "oklch": {
    "l": 0.5253,
    "c": 0.21262,
    "h": 276.2
  },
  "luminance": 0.1307
}

Semantic roles & 50–950 ramp

primary

#5151E1

secondary

#E3E3AB

accent

#ED3AED

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151E1

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

Preview Lab → · Contrast checker → · Palette generator →