#5166B1#5166B1

#5166B1 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.0% C 0.120 H 270.1°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#5166B1
RGB	rgb(81, 102, 177)
HSL	hsl(227, 38%, 51%)
HSV	hsv(227, 54%, 69%)
CMYK	cmyk(54.2%, 42.4%, 0%, 30.6%)
CIE-LAB	lab(44.84, 14.30, -42.44)
CIE-LCH	lch(44.84, 44.78, 288.62°)
OKLab	oklab(52.96% 0.0002 -0.1205)
OKLCH	oklch(52.96% 0.12 270.1)
XYZ	xyz(16.0779, 14.4253, 43.5236)
Luminance	0.1443 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5166B1 #B19C51

analogous

#5196B1 #5166B1 #6C51B1

triadic

#5166B1 #B15166 #66B151

tetradic

#5166B1 #B15196 #B19C51 #51B16C

square

#5166B1 #B15196 #B19C51 #51B16C

split-complementary

#5166B1 #B16C51 #96B151

monochromatic

#2A355E #3D4D88 #5166B1 #7B8BC4 #A6B0D7

Accessibility & contrast

On white

5.41

#5166B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#5166B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5166B1

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5166B1	#FFFFFF	#000000	##FFFFFF
##5166B1	1.00	5.41	3.89	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#476FB4

Deuteranopia (green-blind)

#3B66AF

Tritanopia (blue-blind)

#207683

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #5166b1;
/* rgb */ color: rgb(81, 102, 177);
/* oklch */ color: oklch(53.0% 0.120 270.1);

Tailwind

colors: {
  custom: {
    50: '#8991c9',
    500: '#5166b1',
    950: '#000000',
  },
}

SCSS

$custom: #5166b1;
$custom-light: #8991c9;
$custom-dark: #000000;

JSON

{
  "hex": "#5166b1",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 177
  },
  "hsl": {
    "h": 226.875,
    "s": 38.095,
    "l": 50.588
  },
  "oklch": {
    "l": 0.52961,
    "c": 0.12047,
    "h": 270.1
  },
  "luminance": 0.14426
}

Semantic roles & 50–950 ramp

primary

#5166B1

secondary

#C4BB9A

accent

#B55ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #5166B1

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

Preview Lab → · Contrast checker → · Palette generator →