Rounding makes the pass/fail appear incorrect

Example- https://www.oddcontrast.com/#hsl__hsl(196.31_8.1868~_39.763~)__hsl(299_44~_91.5~)

It has a ratio of 4.498..., which rounds to 4.5. 4.5 is displayed, but the pass/fail is determined based on the full number.

Some options-

1. Pass/fail based on the rounded number instead of the full number, which gives less precision (but are they actually significant digits? Probably not)
2. Display a "floor" instead of a rounded number, in which case the example would show 4.49. This maintains that the ratio is not actually passing, but the value is more incorrect.
3. Catch cases where this happens, and show the ratio to more digits, and not round. Always correct, always in sync, but adds more variation to the ratio length.

I guess the question is - do we care more about the pass fail or the ratio being accurate? Or make it a bit more complex and go with option #3?

We may also want to always show 2 digits after the decimal. This doesn't solve this issue, but would make the design more stable.

Reproduce the example at oddcontrast.com using the HSL values in the issue and compare the displayed ratio with the pass/fail result. Review the three proposed rounding approaches and the request for stable decimal formatting; done means the displayed ratio and pass/fail status no longer appear contradictory.