Can I change a Squarespace font that has only one font weight to something else with CSS? i.e. change 400 to 600?

I would like to use Nixie One for my paragraph style, but it is quite light, with only one font weight, 400. 

Is there a way to change it to 500 or 600 with custom code?

If the font only supports one weight there is no way to change that with custom code.

Quote

There are generally limited weights available for a particular font family. When a specified weight doesn't exist, a nearby weight is used.

https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/font-weight

Okay. Thank you for your fast response. I wish there was a tweak for fonts like that 🙃