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Check the inside label on your driver door jamb. It will give you a code for paint color. In the possible occurrence of front-end damage and replacement of the Ford front end to a Mazda, the people who did it probably matched the paint to this code.
Looks like this (not a Ranger, but it will give you an idea):
Mine says "YZ" which is Oxford White; stock color.
Rare? Like RonD mentioned, if a blue Ranger is harder to find, then.........................rare