I've noticed a few people (mostly encountered in Northern Virginia in the United States) who have an otherwise common accent for that area, but pronounce the word "color" more like "collar" (with the first vowel more open and back). Is there a name for that accent feature, or is it linked with any particular regional accent?
An example of the pronunciation would be the word "color" at around 3:10 in this video: https://youtu.be/Q9QHWDVqsQ4?t=188