Coloring (noun)

1. The use of color to add beauty or interest to something.
2. The act or process of adding color to something.

Origin:

Late 17th century: from color + -ing.

Examples:

1. The coloring of the room was done in shades of blue and green.
2. The coloring of the flowers was a delicate process that took patience and skill.
3. The coloring of the picture added depth and interest to the image.
4. The coloring was a way to express creativity and imagination.
5. The coloring was a simple and fun activity for children to do on a rainy day.