Why does K represent black?

Related questions

1. What does an alpha channel do?
2. What does the A in RGBA stand for?
3. What is alpha channel image?
4. What is RGB for transparent?
5. What is Alpha in images?
6. Why is 255 the MAX IP?
7. What is the transparent color code for Photoshop?
8. Why is magenta cyan yellow?
9. What color is Rgba?
10. What is alpha channel used for?

Tags

1. #yellow
2. #detail
3. #combination
4. #plate
5. #magenta
6. #image
7. #impresses
8. #printing
9. #colour
10. #denoting
11. #shorthand
12. #referred
13. #black
14. #artistic
15. #usually
16. #represent
17. #stands