#5151D4#5151D4

#5151D4 is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.4% C 0.196 H 277.0°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#5151D4
RGB	rgb(81, 81, 212)
HSL	hsl(240, 60%, 57%)
HSV	hsv(240, 62%, 83%)
CMYK	cmyk(61.8%, 61.8%, 0%, 16.9%)
CIE-LAB	lab(41.82, 39.03, -67.58)
CIE-LCH	lch(41.82, 78.04, 300.01°)
OKLab	oklab(51.44% 0.0239 -0.1946)
OKLCH	oklch(51.44% 0.196 277)
XYZ	xyz(18.2156, 12.3862, 63.7055)
Luminance	0.1239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151D4 #D4D451

analogous

#5193D4 #5151D4 #9351D4

triadic

#5151D4 #D45151 #51D451

tetradic

#5151D4 #D45193 #D4D451 #51D493

square

#5151D4 #D45193 #D4D451 #51D493

split-complementary

#5151D4 #D49351 #93D451

monochromatic

#222289 #2E2EBA #5151D4 #8282E0 #B3B3EC

Accessibility & contrast

On white

6.04

#5151D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#5151D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151D4

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151D4	#FFFFFF	#000000	##FFFFFF
##5151D4	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D8

Deuteranopia (green-blind)

#005DD1

Tritanopia (blue-blind)

#00728B

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #5151d4;
/* rgb */ color: rgb(81, 81, 212);
/* oklch */ color: oklch(51.4% 0.196 277.0);

Tailwind

colors: {
  custom: {
    50: '#8f82e2',
    500: '#5151d4',
    950: '#000000',
  },
}

SCSS

$custom: #5151d4;
$custom-light: #8f82e2;
$custom-dark: #000000;

JSON

{
  "hex": "#5151d4",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 212
  },
  "hsl": {
    "h": 240,
    "s": 60.369,
    "l": 57.451
  },
  "oklch": {
    "l": 0.51443,
    "c": 0.19603,
    "h": 277
  },
  "luminance": 0.12388
}

Semantic roles & 50–950 ramp

primary

#5151D4

secondary

#DBDBA6

accent

#E444E4

background

#F9F8FE

surface

#F2EFFC

border

#CCCAD5

text

#0E0A15

muted

#7E7C84

Preview Lab

Preview with #5151D4

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

Preview Lab → · Contrast checker → · Palette generator →