A 42-year-old male is found dead in his apartment in Delhi after 18 hours of being discovered by his neighbor. On external examination, the body shows purple-red discoloration over the dependent areas of the back and buttocks. The discoloration blanches on pressure in some areas but not in others. The body temperature is 24°C (normal ambient temperature is 28°C). Which of the following best explains the non-blanching areas of livor mortis?