CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 276 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which colour is #00ffff? (a) red (b) bright green (c) cyan (d) magenta
2. 2.🌈 In #001200 the green part is the hex number 12. What is it as a normal number?
3. 3.🌈 Which hex code is bright green? (a) #00ff00 (b) #00ffff (c) #ff00ff (d) #ff0000
4. 4.🌈 Which hex code is cyan? (a) #ffffff (b) #ff0000 (c) #00ffff (d) #0000ff
5. 5.🌈 Which colour is #000000? (a) cyan (b) black (c) blue (d) red
6. 6.🌈 Which colour of light is strongest in rgb(114, 213, 10)? (a) blue (b) red (c) green
7. 7.🌈 Which colour of light is strongest in rgb(43, 241, 53)? (a) blue (b) green (c) red
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
9. 9.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) red (c) bright green (d) magenta
10. 10.🌈 Which hex code is yellow? (a) #00ffff (b) #00ff00 (c) #ffff00 (d) #ff0000
11. 11.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z
12. 12.🌈 Which colour is #00ff00? (a) cyan (b) bright green (c) red (d) yellow
13. 13.🌈 Which colour of light is strongest in rgb(176, 53, 49)? (a) green (b) blue (c) red
14. 14.🌈 Which colour is #ffff00? (a) magenta (b) bright green (c) yellow (d) red
15. 15.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) bright green (c) white (d) yellow
16. 16.🌈 Which colour of light is strongest in rgb(158, 54, 67)? (a) blue (b) green (c) red
17. 17.🌈 Which hex code is red? (a) #ff0000 (b) #0000ff (c) #00ff00 (d) #ffff00
18. 18.🌈 Which colour is #ff0000? (a) bright green (b) cyan (c) red (d) white
19. 19.🌈 In #00bb00 the green part is the hex number bb. What is it as a normal number?
20. 20.🌈 Which hex code is white? (a) #000000 (b) #ffff00 (c) #ffffff (d) #00ff00
21. 21.🌈 Which colour of light is strongest in rgb(179, 131, 31)? (a) green (b) red (c) blue
22. 22.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 99 (c) 1000 (d) 255
23. 23.🌈 In #ef0000 the red part is the hex number ef. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(187, 59, 67)? (a) blue (b) green (c) red
25. 25.🌈 In #002100 the green part is the hex number 21. What is it as a normal number?
26. 26.🌈 Which colour is #ffffff? (a) black (b) white (c) cyan (d) yellow
27. 27.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) black (d) blue
28. 28.🌈 Which colour of light is strongest in rgb(207, 48, 36)? (a) green (b) blue (c) red
29. 29.🌈 Which hex code is magenta? (a) #00ffff (b) #ff00ff (c) #ffff00 (d) #0000ff
30. 30.🌈 Which colour of light is strongest in rgb(214, 124, 55)? (a) red (b) blue (c) green
31. 31.🌈 Which colour is #0000ff? (a) white (b) bright green (c) magenta (d) blue
32. 32.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) cyan (c) white (d) magenta
33. 33.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) red (c) bright green (d) blue
34. 34.🌈 In #006700 the green part is the hex number 67. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(114, 121, 211)? (a) blue (b) red (c) green
36. 36.🌈 Which colour of light is strongest in rgb(205, 17, 133)? (a) blue (b) red (c) green
37. 37.🌈 Which colour of light is strongest in rgb(216, 55, 21)? (a) red (b) blue (c) green
38. 38.🌈 Which colour of light is strongest in rgb(206, 114, 70)? (a) red (b) blue (c) green
39. 39.🌈 Which colour of light is strongest in rgb(12, 102, 219)? (a) red (b) green (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(175, 132, 92)? (a) blue (b) red (c) green

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