I left the white petals unpainted, taking advantage of the white of the paper and the definition of the fountain pen lines.

Daisies from Lauraly

The Color Scheme is Analogous with One Complement enjoying a reversal of the dominant color.  I used the complement of the analogous cluster to be the dominant color, the Red/Violet of the background.  The analogous colors, Yellow, Yellow-Green and Green are accents to the bold background shapes.  The white petals allow breathing room between the colored shapes.
Drawn first with a fountain pen filled with Noodler’s Rome Burning Ink on Rives BFK printing paper, followed by washes of watercolor.