Look around you. How many colors can you spot in a busy room? I bet you think you can see all the different colors in this world just perfectly. Sorry to tell you that your wrong. Humans can only see a certain amount of colors, after that we see nothing but white. But in truth, there are many colors that exist out there, but our eyes are just not strong enough to spot them all. We learned a bit about the color prism, and how you shine light through one end, and you see all the colors of the rainbow on the other. But I wont get into detail about science. Anyways, today in class we got familiar with colors. Although all of us were hoping to learn a little about photoshop, we were surprised on the color lesson. But as we learned later on, that color is a very important aspect of photoshop, and about anything else too. We talked a little about the color wheel. How we use each of the colors in the color wheel everyday, and sometimes without knowing we use them. For example, when you go to print a picture in color, have you noticed that the colors almost never turn out the same shade as in the picture on your computer screen? Well that's because the printer we use actually uses four other colors to make the colors we want. These four colors are CYMK (cyan, yellow,magenta and key which really is black.)
As we learned at the beginning of the year, the computer uses pixels to show any image. Each pixel is called an RGB pixel. Also known as Red, Green, and Blue pixels. Each pixel contains red, green, and blue. As we take away or add more of these three colors to our pixels, the colors change. For example, if you have more red and blue than green in your pixel, the color will come out shades closer to red and blue.
Each color has 256 picture elements(pixels) in every color. As mentioned before, it contains red, green and blue to make a perfect color. A perfect color is if you enter 255, because 0 is also a level. Then your result will be a perfect blue, meaning it contains no red and green.
If you put all the colors together, you are going to end up with white, and if you enter no levels, you will get black.
Here's a cool fact. There are 16.7 million different shades of colors that we can see! So if you thought you could ever run out of colors to use, think about how many you can choose from!
We learned that the computer has pixels that show colors, but each color on the computer screen is measured in hexadecimals. Just like the binary code we learned about, this is similar to it. Except this is base 16, rather than base 10. So you have to go up by 16's. But here's the tricky part. You cant write two digit numbers in the space because that would give the wrong impression. So what you have to do is use the letters of the alphabet to represent numbers higher than 9. So instead of writing 10 in the box, you would write A. B would be equal to 11. C=12. D=13. E=14. And F=15. Keep in mind that you cant go any further than F(15). Hexadecimals is like the computers language. Its just another way of showing different shades of colors on a computer screen!
Well that's a lot of learning to do.
But for now, its done.
Later days.
- Peggy .
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