#5166CF#5166CF

#5166CF is a mid, vivid blue. Relative luminance 0.158; OKLCH L 54.9% C 0.163 H 271.5°. Best body text is #FFFFFF at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#5166CF
RGB	rgb(81, 102, 207)
HSL	hsl(230, 57%, 56%)
HSV	hsv(230, 61%, 81%)
CMYK	cmyk(60.9%, 50.7%, 0%, 18.8%)
CIE-LAB	lab(46.65, 24.36, -56.89)
CIE-LCH	lch(46.65, 61.88, 293.18°)
OKLab	oklab(54.93% 0.0044 -0.1629)
OKLCH	oklch(54.93% 0.163 271.5)
XYZ	xyz(19.4034, 15.7555, 61.0380)
Luminance	0.1576 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166CF #CFBA51

analogous

#51A5CF #5166CF #7B51CF

triadic

#5166CF #CF5166 #66CF51

tetradic

#5166CF #CF51A5 #CFBA51 #51CF7B

square

#5166CF #CF51A5 #CFBA51 #51CF7B

split-complementary

#5166CF #CF7B51 #A5CF51

monochromatic

#243382 #3146B2 #5166CF #8190DC #B1BAE9

Accessibility & contrast

On white

5.06

#5166CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.15

#5166CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166CF

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166CF	#FFFFFF	#000000	##FFFFFF
##5166CF	1.00	5.06	4.15	5.06
#FFFFFF	5.06	1.00	21.00	1.00
#000000	4.15	21.00	1.00	21.00
##FFFFFF	5.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B74D3

Deuteranopia (green-blind)

#0869CD

Tritanopia (blue-blind)

#007E91

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #5166cf;
/* rgb */ color: rgb(81, 102, 207);
/* oklch */ color: oklch(54.9% 0.163 271.5);

Tailwind

colors: {
  custom: {
    50: '#8d91de',
    500: '#5166cf',
    950: '#000000',
  },
}

SCSS

$custom: #5166cf;
$custom-light: #8d91de;
$custom-dark: #000000;

JSON

{
  "hex": "#5166cf",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 207
  },
  "hsl": {
    "h": 230,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.54929,
    "c": 0.16298,
    "h": 271.5
  },
  "luminance": 0.15757
}

Semantic roles & 50–950 ramp

primary

#5166CF

secondary

#D8CFA4

accent

#C748E0

background

#F9F8FD

surface

#F1F0FB

border

#CBCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5166CF

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

Preview Lab → · Contrast checker → · Palette generator →