For someone with acquired blindness, the discription would be:
A yellow color, but with metallic luster. It's like the difference between gray and the color you saw on a nickel or a stainless steel fork. 

For someone with congenital blindness, the discription would be:
It is a color resembling the gold metal, and can also be used to describe something that is mainly yellow but is glowing or reflecting light. For example, the sun, the reflection of sunlight on metal or water surface, a bright flame, or a wheat field in daytime. When used in arts, it often symbolizes wealth, luxury, hope, or triumph.
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