If the blue Nivea cream tin were red, would the effect of the cream be the same?

The color of the Nivea cream tin is just that — a color. It’s a recognizable brand design, not a secret ingredient. Whether it's blue, red, or polka-dotted, the actual cream inside remains chemically the same, so its moisturizing effect doesn’t change. Changing the tin color might mess with your brain's expectations, but your skin won't care.