Spriter - Tool for making 2d animations easier

[User137]

TSpineVertexData = packed record
  x, y, u, v, r, g, b, a: Single;
end;

Is there any speed benefit in using single type for color channels? Because this takes 12 bytes less data per vertex:

TSpineVertexData = packed record
  x, y, u, v: Single;
  r, g, b, a: byte;
end;