crimson, deep
faint, slight

hide
She tried to hide her fiery blush.

deepen
colour/color sb's cheeks, creep, rise, spread
A deep blush spread from her head to her neck.

with a blush, without a blush
She lowered her eyes with a deep blush.

blush of
a blush of embarrassment

a blush comes to sb's cheeks, a blush comes to sb's face
bring a blush to sb's cheeks, bring a blush to sb's face
save sb's blushes, spare sb's blushes (= to save sb from an embarrassing situation)

deeply, furiously, hotly, profusely
faintly, a little, slightly
angrily, guiltily
shyly

make sb
Stop teasing—you're making him blush.

at
He blushed at the mention of her name.

with
She blushed crimson with embarrassment.

blush crimson, blush pink, blush red, blush scarlet
Lia blushed a deep shade of red.

Blush is used with these nouns as the subject:
cheek