#5171BC#5171BC

#5171BC is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.0% C 0.122 H 265.2°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#5171BC
RGB	rgb(81, 113, 188)
HSL	hsl(222, 44%, 53%)
HSV	hsv(222, 57%, 74%)
CMYK	cmyk(56.9%, 39.9%, 0%, 26.3%)
CIE-LAB	lab(48.50, 11.09, -43.01)
CIE-LCH	lch(48.50, 44.42, 284.46°)
OKLab	oklab(55.97% -0.0102 -0.122)
OKLCH	oklch(55.97% 0.122 265.2)
XYZ	xyz(18.3725, 17.1890, 49.9168)
Luminance	0.1719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5171BC #BC9C51

analogous

#51A6BC #5171BC #6651BC

triadic

#5171BC #BC5171 #71BC51

tetradic

#5171BC #BC51A6 #BC9C51 #51BC66

square

#5171BC #BC51A6 #BC9C51 #51BC66

split-complementary

#5171BC #BC6651 #A6BC51

monochromatic

#293C6A #3A5596 #5171BC #7D95CD #A9B9DE

Accessibility & contrast

On white

4.73

#5171BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#5171BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5171BC

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5171BC	#FFFFFF	#000000	##FFFFFF
##5171BC	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5178BF

Deuteranopia (green-blind)

#446FBA

Tritanopia (blue-blind)

#02828D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5171bc;
/* rgb */ color: rgb(81, 113, 188);
/* oklch */ color: oklch(56.0% 0.122 265.2);

Tailwind

colors: {
  custom: {
    50: '#8a99d0',
    500: '#5171bc',
    950: '#000000',
  },
}

SCSS

$custom: #5171bc;
$custom-light: #8a99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5171bc",
  "rgb": {
    "r": 81,
    "g": 113,
    "b": 188
  },
  "hsl": {
    "h": 222.056,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.55975,
    "c": 0.12247,
    "h": 265.2
  },
  "luminance": 0.1719
}

Semantic roles & 50–950 ramp

primary

#5171BC

secondary

#CCBE9D

accent

#AE54D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #5171BC

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

Preview Lab → · Contrast checker → · Palette generator →