response: The blood in your veins is colored red because of your protein hemoglobin.
original_response: the blood in your veins is colored red because of your protein hemoglobin
history: Do you like red, it's my favorite color! I can't see because I'm a bot, but my knowledge of red is that it's at one end of the spectrum of visible light, opposite violet. It's just before infrared right? I actually don't know, but its dominant wavelength is 625-740 nanometers. It's interesting that we can assign numerical values to colors. The planet Mars looks red because of iron oxide. Wow, that's awesome!
knowledge: The red colour of blood comes from protein hemoglobin, while ripe strawberries, red apples and reddish autumn leaves are colored by anthocyanins.