I appreciate your reasoning but I have to disagree with one part. Based on the entire color wheel, yes, the colors in question are similar, but it's still enough to make a noticeable difference on a character's design. I think it's pretty objectively agreeable that some character with one main color (think Sonic's blue), if it were color 1, would look hugely different if replaced with colors 2 or 3. In this case, while it's not Awakening Roy's main color per se, it's a symbol of his royalty, so it sticks out.