it is blue everyone knows that it is only when the blood comes in contact with air it changes
You match the rings with the bolts. Look carefully at the bolts, there is an inside and outside color... dark or light. If the bolt in the corresponding color is dark on the inside and dark on the outside, then tap the ring on the door until it looks the same as the bolt. Do this with all four bolt-ring combinations, and the doors will open. Just in case it is hard to tell: Upper left bolt is Dark-inside, Dark outside Upper right is Light-inside, Light outside Lower left is Light-inside, Dark outside Lower Right is Dark-inside, Light outside.
You match the rings with the bolts. Look carefully at the bolts, there is an inside and outside color... dark or light. If the bolt in the corresponding color is dark on the inside and dark on the outside, then tap the ring on the door until it looks the same as the bolt. Do this with all four bolt-ring combinations, and the doors will open. Just in case it is hard to tell: Upper left bolt is Dark-inside, Dark outside Upper right is Light-inside, Light outside Lower left is Light-inside, Dark outside Lower Right is Dark-inside, Light outside.
Period blood can be light in color in the first couple days of your period, but it can also be very dark in color on heavier days.
No deoxygenated blood is dark red and oxygenated blood is lightish red.
The blood of a horseshoe crab is blue, it's not deep, it's more of a pale blue. It's blue rather than red like ours, due to the presence of haemocyanin in the blood cells, instead of haemoglobin.
Yes it can as dark and light colors absorb and reflect light. The darker the more it absorbs light and heat energy.
Light colored
A dark gray color
Rods are for seeing light and dark, cones are for seeing color.
Some will say that the blood is blue in the veins because your veins are blue looking. This is incorrect. The blood is in fact red inside the veins, the veins just look blue due to the way the light passes through the fat and skin cells above.
dark
Dark colours absorb the most light.