#5170BC#5170BC

#5170BC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.124 H 265.8°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#5170BC
RGB	rgb(81, 112, 188)
HSL	hsl(223, 44%, 53%)
HSV	hsv(223, 57%, 74%)
CMYK	cmyk(56.9%, 40.4%, 0%, 26.3%)
CIE-LAB	lab(48.22, 11.71, -43.45)
CIE-LCH	lch(48.22, 45.01, 285.08°)
OKLab	oklab(55.76% -0.0091 -0.1234)
OKLCH	oklch(55.76% 0.124 265.8)
XYZ	xyz(18.2615, 16.9671, 49.8799)
Luminance	0.1697 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5170BC #BC9D51

analogous

#51A5BC #5170BC #6851BC

triadic

#5170BC #BC5170 #70BC51

tetradic

#5170BC #BC51A5 #BC9D51 #51BC68

square

#5170BC #BC51A5 #BC9D51 #51BC68

split-complementary

#5170BC #BC6851 #A5BC51

monochromatic

#293C6A #3A5496 #5170BC #7D94CD #A9B9DE

Accessibility & contrast

On white

4.78

#5170BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#5170BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5170BC

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5170BC	#FFFFFF	#000000	##FFFFFF
##5170BC	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5078BF

Deuteranopia (green-blind)

#426EBA

Tritanopia (blue-blind)

#03818D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5170bc;
/* rgb */ color: rgb(81, 112, 188);
/* oklch */ color: oklch(55.8% 0.124 265.8);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#5170bc",
  "rgb": {
    "r": 81,
    "g": 112,
    "b": 188
  },
  "hsl": {
    "h": 222.617,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.5576,
    "c": 0.12369,
    "h": 265.8
  },
  "luminance": 0.16969
}

Semantic roles & 50–950 ramp

primary

#5170BC

secondary

#CCBE9D

accent

#AF54D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #5170BC

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

Preview Lab → · Contrast checker → · Palette generator →