(i)

the Monday morning blues

-

feel embarrassed / angry / ashamed

(ii)

go red in the face

-

feel very sick, as if about to vomit

(iii)

look green

-

sadness or depression after a weekend of fun

(iv)

the red carpet

-

the sign or permission to begin an action

(v)

blue-blooded

-

a sign of surrender or acceptance of defeat; a wish to stop fighting

(vi)

a green belt

-

in an unlawful act; while doing something wrong

(vii)

a blackguard

-

a photographic print of building plans; a detailed plan or scheme

(viii)

a grey area

-

land around a town or city where construction is prohibited by law

(ix)

a white flag

-

an area of a subject or a situation where matters are not very clear

(x)

a blueprint

-

a dishonest person with no sense of right or wrong

(xi)

red-handed

-

a special welcome

(xii)

the green light

-

of noble birth or from a royal family

lined up

thought up

took off

stood by