BBC Learning English - The Teacher

Funny video lessons

Blue

Silver

Green

Gold

Red
White

Second Nature Online English

Mini-lesson with definitions, examples and answers.

Jennifer ESL Video Lesson - Colour Idioms

Study with Jennifer, an English teacher in the USA.

Colour Idioms

Short quiz.

Idioms at English-at-Home

Long list of idioms.

UsingEnglish Idiom Dictionary - Colour Idioms

A huge number of idioms and definitions!