true blue

Meaning

Adj

1. (not-comparable) Steadfastly faithful or loyal; unwavering in loyalty; staunch, true.
2. (UK, not-comparable) Steadfastly faithful or loyal; unwavering in loyalty; staunch, true.
3. (Scotland, historical, not-comparable) Steadfastly faithful or loyal; unwavering in loyalty; staunch, true.
4. (not-comparable) Steadfastly faithful or loyal; unwavering in loyalty; staunch, true.
5. (not-comparable) Representing the true essence of something; authentic, genuine, honest.
6. (Australia, informal, not-comparable, specifically) Representing the true essence of something; authentic, genuine, honest.
7. (UK, not-comparable) Aristocratic by birth.
8. (not-comparable) Used other than figuratively or idiomatically: see true, blue.

Noun

1. (countable) A faithful partisan or supporter of a cause, person, political party, etc.
2. (historical, uncountable) A blue dye from Coventry, England, famous for not washing out.
3. (countable, uncountable) A precisely defined pure blue, as for example web color #0000FF = RGB(0,0,255).

Synonyms

true

faithful

constant

credible

direct

forthright

genuine

hearty

loyal

open

outspoken

sincere

single-minded

stanch

staunch

sterling

straightforward

⬆️

trusty

frank

single-hearted

whole hearted

candid

open faced

constancy

Pronounced as (IPA)

/ˌtruː ˈbluː/

Etymology

From true (adjective) + blue (“steadfastly faithful or loyal”, adjective). The symbolism of the colour blue as representing constancy, faithfulness, loyalty, and truth may derive from the constant colour of the sky, or the tendency of certain blue dyes to resist fading, especially those made in Coventry.
Adjective senses 1.1.2 (“of or pertaining to the Tory, and now the Conservative, political party”) and 1.1.3 (“of or pertaining to the Scottish Presbyterian or Whig political party in the 17th century”) probably both allude to sense 1 (“steadfastly faithful or loyal”). Sense 1.1.2 may also allude to sense 1.1.3 which is older, and sense 1.1.3 may partly allude to the blue colour of the flag of Scotland.