We can display 𝗽𝗿𝗼𝗴𝗿𝗲𝘀𝘀 𝗶𝗻𝗱𝗶𝗰𝗮𝘁𝗼𝗿𝘀 with customized colors on the list view of any table by creating a field of type “𝗣𝗲𝗿𝗰𝗲𝗻𝘁 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲” On the form view, this field type accepts 𝗱𝗲𝗰𝗶𝗺𝗮𝗹 𝗶𝗻𝗽𝘂𝘁; on the list view, it appears as a progress indicator bar. We can specify the threshold and respective colors, the attribute named 𝘁𝗮𝗿𝗴𝗲𝘁_𝘁𝗵𝗿𝗲𝘀𝗵𝗼𝗹𝗱_𝗰𝗼𝗹𝗼𝗿𝘀 is used to define these parameters example: 𝘁𝗮𝗿𝗴𝗲𝘁_𝘁𝗵𝗿𝗲𝘀𝗵𝗼𝗹𝗱_𝗰𝗼𝗹𝗼𝗿𝘀:𝟬:𝗿𝗲𝗱;𝟯𝟬:𝗼𝗿𝗮𝗻𝗴𝗲;𝟳𝟬:𝘆𝗲𝗹𝗹𝗼𝘄;𝟵𝟬:𝗴𝗿𝗲𝗲𝗻 Based on this condition, if the value lies between 0–29 the progress bar color would be 𝗿𝗲𝗱 if the value is between 30–69 — the color would be 𝘆𝗲𝗹𝗹𝗼𝘄, and so on.

Check out the docs for more info: Percent complete field type (servicenow.com)