#5151AC#5151AC

#5151AC is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.4% C 0.142 H 279.7°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#5151AC
RGB	rgb(81, 81, 172)
HSL	hsl(240, 36%, 50%)
HSV	hsv(240, 53%, 67%)
CMYK	cmyk(52.9%, 52.9%, 0%, 32.5%)
CIE-LAB	lab(38.92, 25.95, -48.96)
CIE-LCH	lch(38.92, 55.41, 297.92°)
OKLab	oklab(48.37% 0.0239 -0.1398)
OKLCH	oklch(48.37% 0.142 279.7)
XYZ	xyz(13.7799, 10.6119, 40.3439)
Luminance	0.1061 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151AC #ACAC51

analogous

#517FAC #5151AC #7F51AC

triadic

#5151AC #AC5151 #51AC51

tetradic

#5151AC #AC517F #ACAC51 #51AC7F

square

#5151AC #AC517F #ACAC51 #51AC7F

split-complementary

#5151AC #AC7F51 #7FAC51

monochromatic

#2A2A59 #3D3D82 #5151AC #7A7AC0 #A3A3D4

Accessibility & contrast

On white

6.73

#5151AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#5151AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151AC

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151AC	#FFFFFF	#000000	##FFFFFF
##5151AC	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#205FAF

Deuteranopia (green-blind)

#1458AA

Tritanopia (blue-blind)

#2A6576

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #5151ac;
/* rgb */ color: rgb(81, 81, 172);
/* oklch */ color: oklch(48.4% 0.142 279.7);

Tailwind

colors: {
  custom: {
    50: '#8981c5',
    500: '#5151ac',
    950: '#000000',
  },
}

SCSS

$custom: #5151ac;
$custom-light: #8981c5;
$custom-dark: #000000;

JSON

{
  "hex": "#5151ac",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 172
  },
  "hsl": {
    "h": 240,
    "s": 35.968,
    "l": 49.608
  },
  "oklch": {
    "l": 0.48374,
    "c": 0.14185,
    "h": 279.7
  },
  "luminance": 0.10613
}

Semantic roles & 50–950 ramp

primary

#5151AC

secondary

#C1C198

accent

#CC5CCC

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0C0A13

muted

#7D7C82

Preview Lab

Preview with #5151AC

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

Preview Lab → · Contrast checker → · Palette generator →