What would a blue object look like shone onto a grey light?

When a blue object is illuminated by grey light, which is a neutral mix of colors often lacking strong saturation, the object will appear muted or less vibrant. The blue hue may still be visible, but it will likely appear more subdued and closer to a desaturated blue or even a greyish tone, depending on the intensity of the grey light. The overall effect is that the object's blue color doesn't stand out as brightly as it would under white or colorful lighting.