#5170BB#5170BB

#5170BB is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.7% C 0.122 H 265.7°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#5170BB
RGB	rgb(81, 112, 187)
HSL	hsl(222, 44%, 53%)
HSV	hsv(222, 57%, 73%)
CMYK	cmyk(56.7%, 40.1%, 0%, 26.7%)
CIE-LAB	lab(48.16, 11.38, -42.96)
CIE-LCH	lch(48.16, 44.44, 284.83°)
OKLab	oklab(55.7% -0.0093 -0.1219)
OKLCH	oklch(55.7% 0.122 265.7)
XYZ	xyz(18.1541, 16.9241, 49.3141)
Luminance	0.1693 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5170BB #BB9C51

analogous

#51A5BB #5170BB #6751BB

triadic

#5170BB #BB5170 #70BB51

tetradic

#5170BB #BB51A5 #BB9C51 #51BB67

square

#5170BB #BB51A5 #BB9C51 #51BB67

split-complementary

#5170BB #BB6751 #A5BB51

monochromatic

#293C69 #3A5595 #5170BB #7D94CC #A9B8DD

Accessibility & contrast

On white

4.79

#5170BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#5170BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5170BB

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5170BB	#FFFFFF	#000000	##FFFFFF
##5170BB	1.00	4.79	4.39	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5177BE

Deuteranopia (green-blind)

#436EB9

Tritanopia (blue-blind)

#07818C

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5170bb;
/* rgb */ color: rgb(81, 112, 187);
/* oklch */ color: oklch(55.7% 0.122 265.7);

Tailwind

colors: {
  custom: {
    50: '#8a98d0',
    500: '#5170bb',
    950: '#000000',
  },
}

SCSS

$custom: #5170bb;
$custom-light: #8a98d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5170bb",
  "rgb": {
    "r": 81,
    "g": 112,
    "b": 187
  },
  "hsl": {
    "h": 222.453,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.55701,
    "c": 0.12227,
    "h": 265.7
  },
  "luminance": 0.16926
}

Semantic roles & 50–950 ramp

primary

#5170BB

secondary

#CBBD9D

accent

#AE54D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #5170BB

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

Preview Lab → · Contrast checker → · Palette generator →