Staunch and steadfast (4,4)

I believe the answer is:

true blue

(Other definitions for true blue that I've seen before include "Firmly loyal like genuine cerulean" , "Staunchly loyal (Tory?)" , "Staunchly loyal to the Conservative Party" , "Staunch Tory" , "Colour of unswerving loyalty" .)

I've seen this clue in The Washington Post.

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