No, birds do not have blue blood. Like most other vertebrates, birds have red blood due to the presence of hemoglobin, a protein that carries oxygen in the blood. The red color of blood comes from the iron in hemoglobin, which binds to oxygen and gives blood its red hue. Blue blood is typically found in certain invertebrates, such as horseshoe crabs, due to the presence of copper-based hemocyanin. **

The term "blue blood" originally referred to the noble class in European societies, who were believed to have skin so fair that their veins appeared blue. Over time, the term has come to symbolize the aristocracy or upper class. It is used to describe individuals who come from wealthy, privileged, or noble backgrounds. **

Some animals that have blue or green blood include certain species of skinks, octopuses, and horseshoe crabs. These animals have a copper-based molecule called hemocyanin in their blood, which gives it a blue or green color when oxygenated. This is in contrast to most vertebrates, including humans, whose blood contains iron-based hemoglobin and appears red when oxygenated. **

Blue blood in the bathroom could indicate the presence of copper in the water supply. Copper can cause a bluish-green stain when it reacts with certain chemicals in the water. This could be a sign of corrosion in the plumbing system, which can be a health concern and should be addressed by a professional plumber. It's important to have the water tested and the plumbing system inspected to determine the source of the issue and ensure the water is safe for use. **

It was said that nobles had blue blood because their skin was so fair that their veins appeared blue. This belief likely originated from the fact that nobles often did not engage in manual labor, so their skin was paler and their veins more visible. Additionally, the color blue has long been associated with royalty and nobility, as it was a rare and expensive pigment to obtain for clothing and decorations. Therefore, the idea of nobles having blue blood became a symbol of their elevated status and privilege. **

Blue light appears blue because it has a shorter wavelength and higher energy compared to other colors in the visible light spectrum. When white light, which is a combination of all colors, passes through a prism or a medium that disperses light, the shorter wavelength blue light is refracted more than longer wavelength colors like red or green. This causes blue light to be separated and appear blue to our eyes. **

If you have blue blood, it means that you have a high concentration of copper-based hemocyanin in your blood, which is found in certain mollusks and arthropods. However, humans do not have blue blood. If you were to hypothetically have blue blood, it would not affect the color of your skin or the color of anything else about you. So, you would fly whatever color you choose, regardless of the color of your blood. **

Yes, royal blue can go well with light blue. The combination of these two shades of blue can create a harmonious and visually appealing color palette. You can use royal blue as a bold accent color against a backdrop of light blue, or you can mix and match different shades of blue in your outfit or decor for a stylish and cohesive look. Overall, royal blue and light blue can complement each other nicely when paired together. **