#5151C0#5151C0

#5151C0 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.9% C 0.170 H 278.3°. Best body text is #FFFFFF at 6.39:1 contrast (WCAG AA passes).

Color values

HEX	#5151C0
RGB	rgb(81, 81, 192)
HSL	hsl(240, 47%, 54%)
HSV	hsv(240, 58%, 75%)
CMYK	cmyk(57.8%, 57.8%, 0%, 24.7%)
CIE-LAB	lab(40.31, 32.48, -58.47)
CIE-LCH	lch(40.31, 66.89, 299.05°)
OKLab	oklab(49.85% 0.0245 -0.1678)
OKLCH	oklch(49.85% 0.17 278.3)
XYZ	xyz(15.8472, 11.4388, 51.2318)
Luminance	0.1144 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151C0 #C0C051

analogous

#5188C0 #5151C0 #8851C0

triadic

#5151C0 #C05151 #51C051

tetradic

#5151C0 #C05188 #C0C051 #51C088

square

#5151C0 #C05188 #C0C051 #51C088

split-complementary

#5151C0 #C08851 #88C051

monochromatic

#28286F #38389B #5151C0 #7E7ED0 #ABABE1

Accessibility & contrast

On white

6.39

#5151C0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#5151C0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151C0

6.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151C0	#FFFFFF	#000000	##FFFFFF
##5151C0	1.00	6.39	3.29	6.39
#FFFFFF	6.39	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064C4

Deuteranopia (green-blind)

#005ABE

Tritanopia (blue-blind)

#096B80

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #5151c0;
/* rgb */ color: rgb(81, 81, 192);
/* oklch */ color: oklch(49.9% 0.170 278.3);

Tailwind

colors: {
  custom: {
    50: '#8c82d4',
    500: '#5151c0',
    950: '#000000',
  },
}

SCSS

$custom: #5151c0;
$custom-light: #8c82d4;
$custom-dark: #000000;

JSON

{
  "hex": "#5151c0",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 192
  },
  "hsl": {
    "h": 240,
    "s": 46.835,
    "l": 53.529
  },
  "oklch": {
    "l": 0.49852,
    "c": 0.16957,
    "h": 278.3
  },
  "luminance": 0.1144
}

Semantic roles & 50–950 ramp

primary

#5151C0

secondary

#CECE9F

accent

#D651D6

background

#F9F7FD

surface

#F1EEFA

border

#CBC9D3

text

#0D0A14

muted

#7E7C83

Preview Lab

Preview with #5151C0

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

Preview Lab → · Contrast checker → · Palette generator →