- Blue is one of the primary colours in the RYB model.
- It is one of the colours of the visible spectrum.
- The sky is blue.
- Water bodies also appear blue because they reflect the sky.
- Blue is a cool colour.
- Blue is also regarded as the colour of peace.
- Blue is a very rare colour in the natural world.
- There are many shades of blue such as cyan, navy, turquoise, etc.
- Blue is the favourite colour of many people.
- It is also associated with melancholy and sadness.
