Mars in particular is obviously reddish to the naked eye. If you’re in the US, it’s likely visible right now.
As for stars, they’re emitting light at a wide range of frequencies because they’re extremely hot, but hotter stars are more bluish, and cooler stars are more reddish. Think of it more like comparing a soft white lightbulb to a daylight tinted light bulb. They’re different colors, but it might be difficult to tell if they’re not right next to each other.
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