Over time, the SNES system would turn yellow, you aren't seeing things. Depending on environment, the system would turn to a light yellow due to sun rays or a warm environment.
When the SNES was released in Japan, many people, including adults, were pretending to be sick. The reason for this is because they wanted to get the system before it sold out, or to stay at home and play.
Nintendo didn't have enough copies of the SNES in Japan, this caused a massive frenzy of people making orders and not getting what they wanted. This actually caused riots which forced the Japanese government to make new laws regarding pre-orders and shipments.
The SNES was nearly never made. Nintendo never had the idea to make a SNES after the NES was released. This is because they never thought they'd have to make a new system. It was believed that they thought the NES would last longer and wouldn't need any competition.