Good Tonal Value is More Important Than Good Colour Choices
This is the crux of painting with colors. I think this is also why duotone palettes are great to work with—you learn rapidly how much value matters in terms of getting your audience to parse what your art represents.
Below are a rendition of a sugar packet holder and creamer done twice, once on the left with color accurate to the original reference, and once on the right with color highly different from the original reference. I also included for comparison their value-only, grayscale versions beneath. There's a very palpable difference between the two, even though both are muted in their color palette.
Ava Jarvis is an ink and watercolor artist with a portfolio site at avajarvisart.com. If you found this post useful, consider a one-time tip or supporting Ava on Patreon.