It is the RGB system. It makes colors by mixing the right amounts of red, green, and blue light. Here it mixed only red and blue.
The size of the art is not a requirements for a portfolio.
<h3>What is portfolio?</h3>
A portfolio includes art work an design that are best for display.
Artist present their best work for portfolio showcasing their skill, drawings and painting and the dept of their knowledge in artwork or art form.
Therefore, the size of the art is not a requirements for a portfolio.
Learn more about artist here
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