Colours/Colors explained

Hello Readers,

Welcome to Explain GK !!

We will look at colours 🎨 at this post.

Colours are playing essential role in our daily life. Mainly in textiles, paint and goods. We all have our favourite colours.

We have found more than 16 million colours !!!

Colours are related to science about light. Spectrum of light makes us to identify colours. When a white light (ex : mercury vapor lamp) passed via a prism will be splitted into multiple colour lines.

The same concept is used in appearing rainbow. 

when sun light in the early morning or evening will make spectrum of colours makes a rainbow when it passed via rain droplet 🌞 ➕☔. Here rain droplet will be acting as glass prism.

Primary colours

What is primary colour and why it is called primary colours?

Red, Green and Blue are called primary, in short it is called RGB colour system.

Using these 3 colours we can form any colours. RGB colours are basically arrived using value of 0 to 255 as it’s density. When all red, green and blue are used in full density then it forms white colour. When all red, green and blue are 0 in it’s density then it forms black colour.

ok, but I have a doubt

When I was explaining this concept in a training one of my audiences asked me, when I use red, green and blue sketch pencils one top of another in a white paper I am getting black colour. Then how you say it is white colours (looks like it is correct right 😏).

Actually the real concept can be achieved through an science experiment of red, green and blue lights. 

When all 3 lights spectrums passed to a single point we can see white colour.

We have called some more colour models. CMYK (Cyan, Magenta, Yellow and Black).

Colour Red has highest wave length and colour Blue has highest frequency in primary colours. Colour violet has more frequency in the 7 colours of 🌈. That is why we get order of colours as VIBGYOR (Violet, Indigo, Blue, Green, Yellow, Orange, Red) in rainbow. 

There is also another science concept Raman effect by Popular Indian scientist  explains why Sky and Sea looks as blue where actually it is not blue in colour.

There is a famous festival celebrated in India called Holi the festival of Colours 🎊🎉