#5151CF#5151CF

#5151CF is a mid, vivid blue. Relative luminance 0.121; OKLCH L 51.0% C 0.190 H 277.3°. Best body text is #FFFFFF at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#5151CF
RGB	rgb(81, 81, 207)
HSL	hsl(240, 57%, 56%)
HSV	hsv(240, 61%, 81%)
CMYK	cmyk(60.9%, 60.9%, 0%, 18.8%)
CIE-LAB	lab(41.43, 37.40, -65.34)
CIE-LCH	lch(41.43, 75.28, 299.79°)
OKLab	oklab(51.04% 0.0241 -0.188)
OKLCH	oklch(51.04% 0.19 277.3)
XYZ	xyz(17.5946, 12.1378, 60.4350)
Luminance	0.1214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151CF #CFCF51

analogous

#5190CF #5151CF #9051CF

triadic

#5151CF #CF5151 #51CF51

tetradic

#5151CF #CF5190 #CFCF51 #51CF90

square

#5151CF #CF5190 #CFCF51 #51CF90

split-complementary

#5151CF #CF9051 #90CF51

monochromatic

#242482 #3131B2 #5151CF #8181DC #B1B1E9

Accessibility & contrast

On white

6.13

#5151CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.43

#5151CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151CF

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151CF	#FFFFFF	#000000	##FFFFFF
##5151CF	1.00	6.13	3.43	6.13
#FFFFFF	6.13	1.00	21.00	1.00
#000000	3.43	21.00	1.00	21.00
##FFFFFF	6.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067D3

Deuteranopia (green-blind)

#005CCC

Tritanopia (blue-blind)

#007088

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #5151cf;
/* rgb */ color: rgb(81, 81, 207);
/* oklch */ color: oklch(51.0% 0.190 277.3);

Tailwind

colors: {
  custom: {
    50: '#8e82df',
    500: '#5151cf',
    950: '#000000',
  },
}

SCSS

$custom: #5151cf;
$custom-light: #8e82df;
$custom-dark: #000000;

JSON

{
  "hex": "#5151cf",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 207
  },
  "hsl": {
    "h": 240,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.51036,
    "c": 0.18952,
    "h": 277.3
  },
  "luminance": 0.12139
}

Semantic roles & 50–950 ramp

primary

#5151CF

secondary

#D8D8A4

accent

#E048E0

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0E0A15

muted

#7E7C83

Preview Lab

Preview with #5151CF

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

Preview Lab → · Contrast checker → · Palette generator →