Hex RGB color to HSL conversion: who is right?

So, while trying to extract HSL values from a hex representation of color (let’s say #9d3434) I get results from WolframAlpha: HSL | hue 0° | saturation 82% | lightness 19%.

But when I tried to use that values directly (in my case in web-browser via CSS) I get strange results: browser is treating WA’s HSL value as #580909, and treating original hex color as hsl(0, 50%, 41%). Quick search for online color converters showed consistency with browser data.

Maybe I misunderstood something? Units look the same (degrees 0-360 and percents 0-100) for their respective columns.

Sorry for my English.

Don’t know if I’m allowed to post links here, but there is the same hex color info from another service

http://rapidtables.com/convert/color/index.htm