message: Derive Default for Color
diff: use palette::rgb::Srgba;
  /// A color in the sRGB color space.
  -#[derive(Debug, Clone, Copy, PartialEq)]
  +#[derive(Debug, Clone, Copy, PartialEq, Default)]
  pub struct Color {
  /// Red component, 0.0 - 1.0
  pub r: f32,
  