#5151E9#5151E9

#5151E9 is a mid, highly saturated blue. Relative luminance 0.135; OKLCH L 53.2% C 0.223 H 275.7°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#5151E9
RGB	rgb(81, 81, 233)
HSL	hsl(240, 78%, 62%)
HSV	hsv(240, 65%, 91%)
CMYK	cmyk(65.2%, 65.2%, 0%, 8.6%)
CIE-LAB	lab(43.53, 45.86, -76.75)
CIE-LCH	lch(43.53, 89.41, 300.86°)
OKLab	oklab(53.22% 0.0223 -0.2215)
OKLCH	oklch(53.22% 0.223 275.7)
XYZ	xyz(21.0389, 13.5156, 78.5750)
Luminance	0.1352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E9 #E9E951

analogous

#519DE9 #5151E9 #9D51E9

triadic

#5151E9 #E95151 #51E951

tetradic

#5151E9 #E9519D #E9E951 #51E99D

square

#5151E9 #E9519D #E9E951 #51E99D

split-complementary

#5151E9 #E99D51 #9DE951

monochromatic

#1616AA #1C1CE0 #5151E9 #8787F0 #BEBEF7

Accessibility & contrast

On white

5.67

#5151E9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#5151E9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E9

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E9	#FFFFFF	#000000	##FFFFFF
##5151E9	1.00	5.67	3.70	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006EEE

Deuteranopia (green-blind)

#0060E6

Tritanopia (blue-blind)

#007996

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #5151e9;
/* rgb */ color: rgb(81, 81, 233);
/* oklch */ color: oklch(53.2% 0.223 275.7);

Tailwind

colors: {
  custom: {
    50: '#9382f1',
    500: '#5151e9',
    950: '#000000',
  },
}

SCSS

$custom: #5151e9;
$custom-light: #9382f1;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e9",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 233
  },
  "hsl": {
    "h": 240,
    "s": 77.551,
    "l": 61.569
  },
  "oklch": {
    "l": 0.53217,
    "c": 0.2226,
    "h": 275.7
  },
  "luminance": 0.13517
}

Semantic roles & 50–950 ramp

primary

#5151E9

secondary

#E7E7AF

accent

#DA0CDA

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0F0A17

muted

#7E7C85

Preview Lab

Preview with #5151E9

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

Preview Lab → · Contrast checker → · Palette generator →