#5151CB#5151CB

#5151CB is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.7% C 0.184 H 277.6°. Best body text is #FFFFFF at 6.20:1 contrast (WCAG AA passes).

Color values

HEX	#5151CB
RGB	rgb(81, 81, 203)
HSL	hsl(240, 54%, 56%)
HSV	hsv(240, 60%, 80%)
CMYK	cmyk(60.1%, 60.1%, 0%, 20.4%)
CIE-LAB	lab(41.13, 36.09, -63.53)
CIE-LCH	lch(41.13, 73.06, 299.60°)
OKLab	oklab(50.72% 0.0243 -0.1827)
OKLCH	oklch(50.72% 0.184 277.6)
XYZ	xyz(17.1118, 11.9447, 57.8922)
Luminance	0.1195 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151CB #CBCB51

analogous

#518ECB #5151CB #8E51CB

triadic

#5151CB #CB5151 #51CB51

tetradic

#5151CB #CB518E #CBCB51 #51CB8E

square

#5151CB #CB518E #CBCB51 #51CB8E

split-complementary

#5151CB #CB8E51 #8ECB51

monochromatic

#25257C #3333AC #5151CB #8080D9 #AFAFE7

Accessibility & contrast

On white

6.20

#5151CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#5151CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151CB

6.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151CB	#FFFFFF	#000000	##FFFFFF
##5151CB	1.00	6.20	3.39	6.20
#FFFFFF	6.20	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066CF

Deuteranopia (green-blind)

#005CC9

Tritanopia (blue-blind)

#006F86

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #5151cb;
/* rgb */ color: rgb(81, 81, 203);
/* oklch */ color: oklch(50.7% 0.184 277.6);

Tailwind

colors: {
  custom: {
    50: '#8e82dc',
    500: '#5151cb',
    950: '#000000',
  },
}

SCSS

$custom: #5151cb;
$custom-light: #8e82dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5151cb",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 203
  },
  "hsl": {
    "h": 240,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.50715,
    "c": 0.18427,
    "h": 277.6
  },
  "luminance": 0.11946
}

Semantic roles & 50–950 ramp

primary

#5151CB

secondary

#D5D5A3

accent

#DD4ADD

background

#F9F7FD

surface

#F2EEFB

border

#CCC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #5151CB

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

Preview Lab → · Contrast checker → · Palette generator →