Meaning & use
I'm feeling blue
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Meanings
phrasefixed phraseinformal
I feel sad or unhappy, often for no clear reason.
Grammar: Used as a complete statement about your own mood; the subject is always 'I' in this exact wording.
Patterns
- I'm feeling blue
- feel blue
- be feeling blue
I'm feeling blue today, so I think I'll stay home and listen to music.
She called me last night because she was feeling blue after the party.
Don't worry if you're feeling blue for a day or two; it usually passes.
phrasefixed phraseinformal
Used with other subjects to say that someone seems sad or quiet.
Grammar: You can change the subject and tense: 'he feels blue', 'they were feeling blue'.
Patterns
- someone feels blue
- someone is feeling blue
- someone was feeling blue
My brother has been feeling blue since his best friend moved away.
The kids seemed a bit blue after the holidays ended.
Common combinations
- feel a bit blue
- I feel a bit blue on rainy Sundays.
- feeling really blue
- After the test, he was feeling really blue.
- be feeling blue about something
- She's feeling blue about leaving her old school.
- feel blue today
- Sorry I'm quiet — I just feel blue today.
Synonyms and how they differ
- down
- 'Down' is also informal and means low in mood; it often suggests a shorter, milder feeling than 'blue'.
- sad
- 'Sad' is the plain, neutral word and works in any situation, while 'blue' sounds more conversational and slightly literary.
- low
- 'Low' is common in British English for a sad mood and is a little more neutral in register than 'blue'.
- unhappy
- 'Unhappy' is stronger and more formal, often suggesting a lasting situation rather than a passing mood.
Opposites
Word family
- blueness noun
- The state of being blue in color, not used for sadness.
- blue adjective
- The color word; also used informally for sadness, as in 'a blue mood'.
Commonly confused: I'm feeling blue or feel blue? I'm feeling blue or be in the blues?
I'm feeling blue vs feel blue
This is the same expression without 'I'm'; learners sometimes think 'blue' means the color here, but it describes a sad mood.
I'm feeling blue vs be in the blues
This is not a normal English phrase; the standard expression is simply 'feel blue' or 'have the blues'.
Practice
Which sentence uses the expression correctly?
Choose one answer.
'Feeling blue' means feeling sad, so it fits a sad event like a friend moving away. Option 2 talks about actual paint, option 3 describes a happy, clear sky, and option 4 uses an infinitive that does not fit this fixed expression.
Make it your own
Write a sentence using “I'm feeling blue”, then check it and compare it with the examples above.