#5151AA#5151AA

#5151AA is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.2% C 0.139 H 279.8°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#5151AA
RGB	rgb(81, 81, 170)
HSL	hsl(240, 35%, 49%)
HSV	hsv(240, 52%, 67%)
CMYK	cmyk(52.4%, 52.4%, 0%, 33.3%)
CIE-LAB	lab(38.79, 25.30, -47.99)
CIE-LCH	lch(38.79, 54.25, 297.80°)
OKLab	oklab(48.23% 0.0238 -0.1369)
OKLCH	oklch(48.23% 0.139 279.8)
XYZ	xyz(13.5892, 10.5357, 39.3399)
Luminance	0.1054 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151AA #AAAA51

analogous

#517EAA #5151AA #7E51AA

triadic

#5151AA #AA5151 #51AA51

tetradic

#5151AA #AA517E #AAAA51 #51AA7E

square

#5151AA #AA517E #AAAA51 #51AA7E

split-complementary

#5151AA #AA7E51 #7EAA51

monochromatic

#2A2A57 #3D3D81 #5151AA #7979BF #A2A2D3

Accessibility & contrast

On white

6.76

#5151AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#5151AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151AA

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151AA	#FFFFFF	#000000	##FFFFFF
##5151AA	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#235FAD

Deuteranopia (green-blind)

#1858A8

Tritanopia (blue-blind)

#2C6575

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #5151aa;
/* rgb */ color: rgb(81, 81, 170);
/* oklch */ color: oklch(48.2% 0.139 279.8);

Tailwind

colors: {
  custom: {
    50: '#8881c4',
    500: '#5151aa',
    950: '#000000',
  },
}

SCSS

$custom: #5151aa;
$custom-light: #8881c4;
$custom-dark: #000000;

JSON

{
  "hex": "#5151aa",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 170
  },
  "hsl": {
    "h": 240,
    "s": 35.458,
    "l": 49.216
  },
  "oklch": {
    "l": 0.48233,
    "c": 0.13899,
    "h": 279.8
  },
  "luminance": 0.10536
}

Semantic roles & 50–950 ramp

primary

#5151AA

secondary

#C0C097

accent

#CB5CCB

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0C0A13

muted

#7D7C82

Preview Lab

Preview with #5151AA

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

Preview Lab → · Contrast checker → · Palette generator →