CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 194 · 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.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 255 (d) 100
2. 2.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) red (c) cyan (d) black
3. 3.🌈 Which colour of light is strongest in rgb(93, 219, 127)? (a) blue (b) red (c) green
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 3 (c) 6 (d) 2
5. 5.🌈 Which colour is #000000? (a) magenta (b) white (c) black (d) red
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) blue (d) red
7. 7.🌈 Which colour of light is strongest in rgb(8, 160, 98)? (a) blue (b) green (c) red
8. 8.🌈 In #009000 the green part is the hex number 90. What is it as a normal number?
9. 9.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
10. 10.🌈 Which colour of light is strongest in rgb(208, 37, 122)? (a) blue (b) green (c) red
11. 11.🌈 Which colour is #0000ff? (a) red (b) white (c) magenta (d) blue
12. 12.🌈 Which hex code is cyan? (a) #ff0000 (b) #00ffff (c) #ffff00 (d) #000000
13. 13.🌈 Which colour is #ffffff? (a) bright green (b) blue (c) white (d) red
14. 14.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) yellow (c) black (d) blue
15. 15.🌈 In #00c400 the green part is the hex number c4. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(182, 25, 134)? (a) blue (b) green (c) red
17. 17.🌈 In #001300 the green part is the hex number 13. What is it as a normal number?
18. 18.🌈 Which colour of light is strongest in rgb(245, 20, 138)? (a) red (b) blue (c) green
19. 19.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) magenta (c) red (d) bright green
20. 20.🌈 Which colour of light is strongest in rgb(175, 129, 36)? (a) blue (b) red (c) green
21. 21.🌈 Which colour is #ffff00? (a) black (b) bright green (c) red (d) yellow
22. 22.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) bright green (c) yellow (d) white
23. 23.🌈 Which colour of light is strongest in rgb(158, 102, 134)? (a) green (b) blue (c) red
24. 24.🌈 In #000a00 the green part is the hex number 0a. What is it as a normal number?
25. 25.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) blue (d) black
26. 26.🌈 In #8d0000 the red part is the hex number 8d. What is it as a normal number?
27. 27.🌈 Which colour is #00ff00? (a) bright green (b) yellow (c) white (d) blue
28. 28.🌈 Which hex code is blue? (a) #00ffff (b) #ffff00 (c) #00ff00 (d) #0000ff
29. 29.🌈 In #00003d the blue part is the hex number 3d. What is it as a normal number?
30. 30.🌈 In #00de00 the green part is the hex number de. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(50, 61, 157)? (a) blue (b) red (c) green
32. 32.🌈 Which colour of light is strongest in rgb(202, 110, 94)? (a) green (b) red (c) blue
33. 33.🌈 Which colour is rgb(255, 255, 255)? (a) cyan (b) bright green (c) magenta (d) white
34. 34.🌈 In #000028 the blue part is the hex number 28. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(24, 95, 191)? (a) red (b) green (c) blue
36. 36.🌈 Which colour of light is strongest in rgb(45, 55, 242)? (a) green (b) red (c) blue
37. 37.🌈 Which hex code is yellow? (a) #ffff00 (b) #00ffff (c) #00ff00 (d) #000000
38. 38.🌈 In #090000 the red part is the hex number 09. What is it as a normal number?
39. 39.🌈 In #5a0000 the red part is the hex number 5a. What is it as a normal number?
40. 40.🌈 In #006000 the green part is the hex number 60. What is it as a normal number?

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