Is the skin between on our tailbone or between our buttocks supposed to be slightly red? i sit a lot and often have mild tailbone bone pain when sitting?

No: If the skin is redder than surrounding skin, that suggests irritation from excessive and persistent pressure. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV and Covid vaccines. Wish you good health!