#5151DD#5151DD

#5151DD is a mid, highly saturated blue. Relative luminance 0.129; OKLCH L 52.2% C 0.208 H 276.4°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#5151DD
RGB	rgb(81, 81, 221)
HSL	hsl(240, 67%, 59%)
HSV	hsv(240, 63%, 87%)
CMYK	cmyk(63.3%, 63.3%, 0%, 13.3%)
CIE-LAB	lab(42.54, 41.97, -71.56)
CIE-LCH	lch(42.54, 82.96, 300.39°)
OKLab	oklab(52.19% 0.0233 -0.2062)
OKLCH	oklch(52.19% 0.208 276.4)
XYZ	xyz(19.3827, 12.8530, 69.8521)
Luminance	0.1285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151DD #DDDD51

analogous

#5197DD #5151DD #9751DD

triadic

#5151DD #DD5151 #51DD51

tetradic

#5151DD #DD5197 #DDDD51 #51DD97

square

#5151DD #DD5197 #DDDD51 #51DD97

split-complementary

#5151DD #DD9751 #97DD51

monochromatic

#1D1D96 #2727C9 #5151DD #8484E7 #B7B7F1

Accessibility & contrast

On white

5.88

#5151DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#5151DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151DD

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151DD	#FFFFFF	#000000	##FFFFFF
##5151DD	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BE1

Deuteranopia (green-blind)

#005EDA

Tritanopia (blue-blind)

#007590

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #5151dd;
/* rgb */ color: rgb(81, 81, 221);
/* oklch */ color: oklch(52.2% 0.208 276.4);

Tailwind

colors: {
  custom: {
    50: '#9182e9',
    500: '#5151dd',
    950: '#000000',
  },
}

SCSS

$custom: #5151dd;
$custom-light: #9182e9;
$custom-dark: #000000;

JSON

{
  "hex": "#5151dd",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 221
  },
  "hsl": {
    "h": 240,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.52192,
    "c": 0.20756,
    "h": 276.4
  },
  "luminance": 0.12855
}

Semantic roles & 50–950 ramp

primary

#5151DD

secondary

#E0E0AA

accent

#EA3EEA

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151DD

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

Preview Lab → · Contrast checker → · Palette generator →