This is the 13535th most frequent German word.
bunte
"Colorful" or "multicolored."
Here, 'bunte' is used as an adjective modifying the noun 'Blume' (flower), describing its colorful nature.
Die bunte Blume leuchtete im Sonnenschein.
The colorful flower shone in the sunlight.
In this sentence, 'bunten' is the attributive adjective describing the plural noun 'Bilder' (pictures), indicating their colorful characteristic.
Ich habe ein Buch mit vielen bunten Bildern.
I have a book with many colorful pictures.
Here, 'bunter' is an adjective modifying the singular noun 'Regenbogen' (rainbow), again denoting its colorful appearance.