Instead of describing the color pink, the poem piles up things that feel pink. The first half is a burst of fairground fun: cotton candy, loud laughter, merry-go-rounds. Then it narrows to something more intimate, with pulsing heartbeats and lips barely touching. The "sassy and playful, hands on hips" line adds a bit of attitude, as if the speaker is picturing someone confident and teasing.
The last four lines slow down. Flowers, piano keys, April showers and a silken gown are softer and more delicate, closer to romance and spring than to carnival noise. Notice that the poem never says "love" or even "pink" in the text itself. The speaker seems to be gathering sweetness, flirtation and tenderness into one mood.
The overall feeling is light, warm and affectionate. The short lines and rhymes in the opening give it a bouncy rhythm, which suits the playful energy before the poem settles into a gentler close.