CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 368 · 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 rgb(255, 0, 255)? (a) blue (b) white (c) yellow (d) magenta
2. 2.🌈 Which colour is rgb(0, 255, 0)? (a) magenta (b) bright green (c) red (d) cyan
3. 3.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 99 (c) 1000 (d) 255
4. 4.🌈 Which colour is #000000? (a) white (b) bright green (c) black (d) cyan
5. 5.🌈 Which colour of light is strongest in rgb(84, 37, 247)? (a) blue (b) red (c) green
6. 6.🌈 In #00db00 the green part is the hex number db. What is it as a normal number?
7. 7.🌈 Which hex code is magenta? (a) #ff00ff (b) #00ff00 (c) #00ffff (d) #ffff00
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) red (d) blue
9. 9.🌈 Which colour is #ff00ff? (a) yellow (b) magenta (c) bright green (d) white
10. 10.🌈 Which hex code is blue? (a) #00ff00 (b) #ff0000 (c) #ff00ff (d) #0000ff
11. 11.🌈 In #000009 the blue part is the hex number 09. What is it as a normal number?
12. 12.🌈 Which hex code is bright green? (a) #0000ff (b) #00ff00 (c) #ffff00 (d) #00ffff
13. 13.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) F (c) G (d) J
14. 14.🌈 In #c40000 the red part is the hex number c4. What is it as a normal number?
15. 15.🌈 Which colour of light is strongest in rgb(111, 118, 242)? (a) red (b) green (c) blue
16. 16.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
17. 17.🌈 Which hex code is cyan? (a) #00ffff (b) #00ff00 (c) #000000 (d) #ff00ff
18. 18.🌈 Which hex code is white? (a) #0000ff (b) #ffffff (c) #ff0000 (d) #00ffff
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) white (c) black (d) red
20. 20.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 3 (c) 2 (d) 6
21. 21.🌈 Which colour of light is strongest in rgb(250, 92, 35)? (a) blue (b) red (c) green
22. 22.🌈 Which colour is #00ffff? (a) black (b) cyan (c) red (d) blue
23. 23.🌈 In #000095 the blue part is the hex number 95. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(129, 239, 0)? (a) blue (b) green (c) red
25. 25.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) white (c) magenta (d) cyan
26. 26.🌈 Which colour is #0000ff? (a) white (b) black (c) blue (d) bright green
27. 27.🌈 Which colour of light is strongest in rgb(100, 6, 158)? (a) red (b) green (c) blue
28. 28.🌈 In #005500 the green part is the hex number 55. What is it as a normal number?
29. 29.🌈 Which colour is #00ff00? (a) bright green (b) cyan (c) red (d) blue
30. 30.🌈 In #0000a8 the blue part is the hex number a8. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(192, 41, 45)? (a) red (b) blue (c) green
32. 32.🌈 In #fc0000 the red part is the hex number fc. What is it as a normal number?
33. 33.🌈 Which hex code is black? (a) #0000ff (b) #00ff00 (c) #000000 (d) #ffff00
34. 34.🌈 In #220000 the red part is the hex number 22. What is it as a normal number?
35. 35.🌈 Which colour is #ffff00? (a) red (b) black (c) blue (d) yellow
36. 36.🌈 Which colour of light is strongest in rgb(102, 16, 154)? (a) blue (b) green (c) red
37. 37.🌈 Which colour of light is strongest in rgb(190, 39, 87)? (a) blue (b) green (c) red
38. 38.🌈 In #000053 the blue part is the hex number 53. What is it as a normal number?
39. 39.🌈 Which hex code is red? (a) #ff0000 (b) #0000ff (c) #ffff00 (d) #00ff00
40. 40.🌈 Which colour of light is strongest in rgb(167, 38, 79)? (a) green (b) red (c) blue

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