View in Different Lighting
Assess your samples in your space’s artificial and natural lighting. When it comes to artificial lighting, warm versus cool light bulbs are a main factor in color variation, especially for white materials like marble. For example, warm lighting will make white appear more yellow, while cool light will make the color appear more blue.
For natural lighting, look at your samples in morning, midday, and evening light. Like paint, a material’s color and detail vary depending on the time of day.