#5151E5#5151E5

#5151E5 is a mid, highly saturated blue. Relative luminance 0.133; OKLCH L 52.9% C 0.218 H 276.0°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#5151E5
RGB	rgb(81, 81, 229)
HSL	hsl(240, 74%, 61%)
HSV	hsv(240, 65%, 90%)
CMYK	cmyk(64.6%, 64.6%, 0%, 10.2%)
CIE-LAB	lab(43.20, 44.57, -75.04)
CIE-LCH	lch(43.20, 87.27, 300.71°)
OKLab	oklab(52.87% 0.0226 -0.2164)
OKLCH	oklch(52.87% 0.218 276)
XYZ	xyz(20.4740, 13.2896, 75.5997)
Luminance	0.1329 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151E5 #E5E551

analogous

#519BE5 #5151E5 #9B51E5

triadic

#5151E5 #E55151 #51E551

tetradic

#5151E5 #E5519B #E5E551 #51E59B

square

#5151E5 #E5519B #E5E551 #51E59B

split-complementary

#5151E5 #E59B51 #9BE551

monochromatic

#1818A3 #2020D8 #5151E5 #8686ED #BBBBF5

Accessibility & contrast

On white

5.74

#5151E5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#5151E5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151E5

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151E5	#FFFFFF	#000000	##FFFFFF
##5151E5	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DEA

Deuteranopia (green-blind)

#005FE2

Tritanopia (blue-blind)

#007794

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5151e5;
/* rgb */ color: rgb(81, 81, 229);
/* oklch */ color: oklch(52.9% 0.218 276.0);

Tailwind

colors: {
  custom: {
    50: '#9282ee',
    500: '#5151e5',
    950: '#000000',
  },
}

SCSS

$custom: #5151e5;
$custom-light: #9282ee;
$custom-dark: #000000;

JSON

{
  "hex": "#5151e5",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 229
  },
  "hsl": {
    "h": 240,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.52872,
    "c": 0.21763,
    "h": 276
  },
  "luminance": 0.13291
}

Semantic roles & 50–950 ramp

primary

#5151E5

secondary

#E5E5AD

accent

#D60FD6

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A17

muted

#7E7C85

Preview Lab

Preview with #5151E5

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

Preview Lab → · Contrast checker → · Palette generator →