Blazer coloured paint (Badwell Ash. Suffolk)

Hello, I want to paint the area behind my woodburner in blazer emulsion - it is a lovely dark red farrow and ball colour. The area is only about a metre square, so it’s too big for a tester and too small to buy a big pot. If there is a bit left in the bottom of the tin it would do the job. I can collect it. Thank you.