https://www.noaa.gov/jetstream/upperair/skew-t-log-p-diagrams
On the left going up in white you have the pressure levels…sfc-1000mb up to 100mb. Horizontal axis is temp/dew in degC…temp is red…dew green. The temp lines slant up and to the right 45°. There’s a little nose of air a bit above 850mb that is higher than 0C.