Thank you for the information,
Numbness of the leg & foot is usually due to any problems with nerve impulse .
Sometimes it may come from abnormalities of blood supply.
But as the temperature & color are normal, circulation is likely to be normal.
The numbness can occur from nerve impingement.
This can occur from disc disease in the spine.
Other nerve conditions or neuropathy can cause it.
I would suggest to take an examination by doctor.
Doctor can take X ray or MRI scan, nerve conduction tests & others depending on clinical examination.
I hope this information helps.
I will be happy to assist, if you need any clarification.
Please feel free for any follow up query.