#5151D8#5151D8

#5151D8 is a mid, highly saturated blue. Relative luminance 0.126; OKLCH L 51.8% C 0.201 H 276.8°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#5151D8
RGB	rgb(81, 81, 216)
HSL	hsl(240, 63%, 58%)
HSV	hsv(240, 63%, 85%)
CMYK	cmyk(62.5%, 62.5%, 0%, 15.3%)
CIE-LAB	lab(42.14, 40.34, -69.36)
CIE-LCH	lch(42.14, 80.24, 300.18°)
OKLab	oklab(51.77% 0.0237 -0.1998)
OKLCH	oklch(51.77% 0.201 276.8)
XYZ	xyz(18.7264, 12.5905, 66.3958)
Luminance	0.1259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151D8 #D8D851

analogous

#5194D8 #5151D8 #9451D8

triadic

#5151D8 #D85151 #51D851

tetradic

#5151D8 #D85194 #D8D851 #51D894

square

#5151D8 #D85194 #D8D851 #51D894

split-complementary

#5151D8 #D89451 #94D851

monochromatic

#20208F #2B2BC1 #5151D8 #8383E3 #B5B5EE

Accessibility & contrast

On white

5.97

#5151D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#5151D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151D8

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151D8	#FFFFFF	#000000	##FFFFFF
##5151D8	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069DC

Deuteranopia (green-blind)

#005ED5

Tritanopia (blue-blind)

#00738D

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #5151d8;
/* rgb */ color: rgb(81, 81, 216);
/* oklch */ color: oklch(51.8% 0.201 276.8);

Tailwind

colors: {
  custom: {
    50: '#9082e5',
    500: '#5151d8',
    950: '#000000',
  },
}

SCSS

$custom: #5151d8;
$custom-light: #9082e5;
$custom-dark: #000000;

JSON

{
  "hex": "#5151d8",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 216
  },
  "hsl": {
    "h": 240,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.51773,
    "c": 0.20119,
    "h": 276.8
  },
  "luminance": 0.12592
}

Semantic roles & 50–950 ramp

primary

#5151D8

secondary

#DDDDA8

accent

#E641E6

background

#F9F8FE

surface

#F2EFFC

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151D8

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

Preview Lab → · Contrast checker → · Palette generator →