Most poems about feeling reach for the right word. "colors of emotions" begins by doubting that words can do the job. "If someone could tell you / Anything / Anything at all / It wouldn't be emotions": the sentence is left slightly unfinished, as if the speaker gave up on it. Telling is not feeling. The poem then lists the ordinary labels, "Happy / Sad / Mad / Or angry", and each gets a line to itself, like items on a chart. "Sad" and "Mad" even rhyme, the only real rhyme in the poem, and the simple, almost nursery-like chime fits the point. These are the emotions everyone can name. Then comes a lone "But," and the poem turns on it.
What follows is a small paradox. The speaker says that as you "understand the world more," you "start to understand the world" but also "start to not understand how you feel." Knowledge of the world and knowledge of the self move in opposite directions. The repeated "You start to" works like a slow countdown, each step a little further from certainty. The phrase "Irregular ones even" is a nice choice, since "irregular" sounds like grammar, as in irregular verbs, the ones that break the rules you were taught. The speaker's new emotions don't fit the categories of the first stanza, and the poem never names them. That silence follows from the opening: if feelings can't be told, they can't be listed either.
The poem speaks to "you" for most of its length, which keeps the tone general and a little distant. The speaker only appears in one place: "And that reminds me." It is a quiet slip into first person, and the poem seems to have been leading to it. After talking about "cruel intentions" and "the true colors of this world," the speaker admits to being one of the people who has seen those colors. "True colors" is a familiar phrase for the real nature of someone or something, and here it quietly sets up the title's color metaphor, which the last stanza completes.
That last stanza turns the metaphor in a surprising direction. "This world is grey," the speaker says. The "true colors" turn out to be one color, and not a bright one. Then comes "Congratulations," addressed to anyone who still sees color. It could be sincere, or sarcastic, or both. It might be an envious tone, or a bitter one. The poem doesn't settle it, and that uncertainty is part of its honesty. The people who see grey, we're told, "wish the color would reappear." The word "reappear" implies that color was once there, so what the poem describes is a loss and not simply a different way of seeing. The title promises "colors of emotions," yet the poem ends in grey, which suggests that getting to know the world has drained something from feeling.
The ending depends heavily on line breaks. "They will never take it for granted / Ever / Again" is really one sentence, but it is cut into pieces so that "Ever" and "Again" land like two slow footsteps. The effect is a vow, or maybe a warning to the reader: whoever has lost color will value it forever if it comes back.
Formally, the poem is free verse. It has no regular meter, no punctuation at line ends, and a capital letter beginning every line, so it reads like speech broken into breaths. The vocabulary is plain throughout, with words like "hurt," "change," "grey" and "color." That plainness suits the idea that real emotion resists fancy description, and the short, abrupt lines give the poem the feel of someone thinking aloud, hesitating and then deciding to say it.
What makes the poem worth reading is that it describes disillusionment without a dramatic story. We aren't told what hurt the speaker or what changed. The poem suggests only that understanding the world has a cost, and that the cost is paid in feeling. Its central claim is a mixed one: seeing clearly and seeing in color may not go together, and anyone who still has the color has something worth noticing.