In the book "A happy Death" by "Albert Camus" , what did Mersault mean when he said, 'When I look at my life and its secret colors, I feel like bursting into tears' ?
I'm going to answer, despite not having read the novel, so apologies in advance! I'd guess that 'colour' is a metaphor that compares Mersault's interior life to colour, with the ground, point of comparison, being how both (colour and his ambitions etc.) add something: life's choices are not monochrome like.
Life is no one single, simple thing, but a series of tensions and dilemmas.
And perhaps, by calling them "secret", Mersault is claiming that his dilemmas are only his
The phrase "bursting into tears" is often used when happy ("I was so happy I burst into tears" is common), so it's ambiguous at least out of context whether he's sad.
The existentialist topic of the book is the "will to happiness," the conscious creation of one's happiness, and the need of time (and money) to do so.