#5151C8#5151C8

#5151C8 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.5% C 0.180 H 277.8°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#5151C8
RGB	rgb(81, 81, 200)
HSL	hsl(240, 52%, 55%)
HSV	hsv(240, 60%, 78%)
CMYK	cmyk(59.5%, 59.5%, 0%, 21.6%)
CIE-LAB	lab(40.90, 35.10, -62.16)
CIE-LCH	lch(40.90, 71.39, 299.45°)
OKLab	oklab(50.48% 0.0244 -0.1786)
OKLCH	oklch(50.48% 0.18 277.8)
XYZ	xyz(16.7578, 11.8031, 56.0275)
Luminance	0.1180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151C8 #C8C851

analogous

#518CC8 #5151C8 #8C51C8

triadic

#5151C8 #C85151 #51C851

tetradic

#5151C8 #C8518C #C8C851 #51C88C

square

#5151C8 #C8518C #C8C851 #51C88C

split-complementary

#5151C8 #C88C51 #8CC851

monochromatic

#262679 #3535A7 #5151C8 #8080D7 #AEAEE5

Accessibility & contrast

On white

6.25

#5151C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#5151C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151C8

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151C8	#FFFFFF	#000000	##FFFFFF
##5151C8	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CC

Deuteranopia (green-blind)

#005BC6

Tritanopia (blue-blind)

#006E85

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #5151c8;
/* rgb */ color: rgb(81, 81, 200);
/* oklch */ color: oklch(50.5% 0.180 277.8);

Tailwind

colors: {
  custom: {
    50: '#8d82da',
    500: '#5151c8',
    950: '#000000',
  },
}

SCSS

$custom: #5151c8;
$custom-light: #8d82da;
$custom-dark: #000000;

JSON

{
  "hex": "#5151c8",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 200
  },
  "hsl": {
    "h": 240,
    "s": 51.965,
    "l": 55.098
  },
  "oklch": {
    "l": 0.50476,
    "c": 0.1803,
    "h": 277.8
  },
  "luminance": 0.11804
}

Semantic roles & 50–950 ramp

primary

#5151C8

secondary

#D3D3A1

accent

#DB4CDB

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #5151C8

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

Preview Lab → · Contrast checker → · Palette generator →