At least in Windows 10, the Unicode ratio character is used instead of a colon when displaying the time on the taskbar. The ratio character is almost the same as the colon character, but it is slightly raised. Since the ratio character isn't supported in Cascadia Code, using it will display a box instead of the correct character.
Implementing the ratio character would be useful because it can be used between numbers like 3∶2 and subjectively looks better than 3:2 with a colon.
Ratio character on left, colon on right — ∶ :
At least in Windows 10, the Unicode ratio character is used instead of a colon when displaying the time on the taskbar. The ratio character is almost the same as the colon character, but it is slightly raised. Since the ratio character isn't supported in Cascadia Code, using it will display a box instead of the correct character.
Implementing the ratio character would be useful because it can be used between numbers like 3∶2 and subjectively looks better than 3:2 with a colon.