The warp is mostly a medium value kind of tomato red (a little more intense than the photo shows), with some yellow.
The first weft is a very light value yellow, the second weft a medium darker tomato red.
The lighter value yellow washes the red out, turning the scarf into a mostly yellow with a little red. The red weft intensifies the red and makes the yellow 'pop'.
Value is more important than hue when choosing weft colours to show off the warp.
The next scarf I'm going to try a green about the same value as the red. I may - or may not - actually weave a scarf with the green.
But! Value is more important than hue!!!
Currently reading Fallout by Sara Paretsky