#5151FF#5151FF

#5151FF is a mid, highly saturated blue. Relative luminance 0.149; OKLCH L 55.2% C 0.249 H 274.5°. Best body text is #FFFFFF at 5.29:1 contrast (WCAG AA passes).

Color values

HEX	#5151FF
RGB	rgb(81, 81, 255)
HSL	hsl(240, 100%, 66%)
HSV	hsv(240, 68%, 100%)
CMYK	cmyk(68.2%, 68.2%, 0%, 0%)
CIE-LAB	lab(45.43, 52.90, -85.98)
CIE-LCH	lch(45.43, 100.95, 301.60°)
OKLab	oklab(55.17% 0.0197 -0.2485)
OKLCH	oklch(55.17% 0.249 274.5)
XYZ	xyz(24.3798, 14.8519, 96.1702)
Luminance	0.1485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151FF #FFFF51

analogous

#51A8FF #5151FF #A851FF

triadic

#5151FF #FF5151 #51FF51

tetradic

#5151FF #FF51A8 #FFFF51 #51FFA8

square

#5151FF #FF51A8 #FFFF51 #51FFA8

split-complementary

#5151FF #FFA851 #A8FF51

monochromatic

#0000D6 #1414FF #5151FF #8E8EFF #CBCBFF

Accessibility & contrast

On white

5.29

#5151FF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#5151FF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151FF

5.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151FF	#FFFFFF	#000000	##FFFFFF
##5151FF	1.00	5.29	3.97	5.29
#FFFFFF	5.29	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0074FF

Deuteranopia (green-blind)

#0063FC

Tritanopia (blue-blind)

#0081A2

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #5151ff;
/* rgb */ color: rgb(81, 81, 255);
/* oklch */ color: oklch(55.2% 0.249 274.5);

Tailwind

colors: {
  custom: {
    50: '#9783ff',
    500: '#5151ff',
    950: '#000000',
  },
}

SCSS

$custom: #5151ff;
$custom-light: #9783ff;
$custom-dark: #000000;

JSON

{
  "hex": "#5151ff",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 255
  },
  "hsl": {
    "h": 240,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.55172,
    "c": 0.24925,
    "h": 274.5
  },
  "luminance": 0.14854
}

Semantic roles & 50–950 ramp

primary

#5151FF

secondary

#F3F3B9

accent

#E600E5

background

#FAF8FF

surface

#F4EFFF

border

#CECAD7

text

#0F0B18

muted

#7F7C86

Preview Lab

Preview with #5151FF

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

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