CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 86 · 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.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) F (d) J
2. 2.🌈 Which colour of light is strongest in rgb(126, 219, 89)? (a) blue (b) green (c) red
3. 3.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 3 (d) 4
4. 4.🌈 Which hex code is cyan? (a) #000000 (b) #ff0000 (c) #00ff00 (d) #00ffff
5. 5.🌈 In #000092 the blue part is the hex number 92. What is it as a normal number?
6. 6.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) bright green (c) yellow (d) red
7. 7.🌈 In #3a0000 the red part is the hex number 3a. What is it as a normal number?
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) blue (d) black
9. 9.🌈 In #4d0000 the red part is the hex number 4d. What is it as a normal number?
10. 10.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) red (c) yellow (d) magenta
11. 11.🌈 Which colour of light is strongest in rgb(54, 252, 45)? (a) red (b) blue (c) green
12. 12.🌈 Which hex code is white? (a) #ffff00 (b) #ff0000 (c) #00ffff (d) #ffffff
13. 13.🌈 Which colour is #ffff00? (a) red (b) cyan (c) yellow (d) white
14. 14.🌈 In #c30000 the red part is the hex number c3. What is it as a normal number?
15. 15.🌈 Which colour is #00ffff? (a) cyan (b) red (c) black (d) blue
16. 16.🌈 Which colour is #0000ff? (a) bright green (b) blue (c) red (d) white
17. 17.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) white (c) green (d) red
18. 18.🌈 Which hex code is magenta? (a) #000000 (b) #00ff00 (c) #ff00ff (d) #ff0000
19. 19.🌈 In #780000 the red part is the hex number 78. What is it as a normal number?
20. 20.🌈 In #00d300 the green part is the hex number d3. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(65, 184, 20)? (a) green (b) red (c) blue
22. 22.🌈 In #00b600 the green part is the hex number b6. What is it as a normal number?
23. 23.🌈 In #000052 the blue part is the hex number 52. What is it as a normal number?
24. 24.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 255 (c) 99 (d) 1000
25. 25.🌈 Which hex code is black? (a) #000000 (b) #00ff00 (c) #ff00ff (d) #ff0000
26. 26.🌈 Which colour of light is strongest in rgb(20, 115, 231)? (a) green (b) blue (c) red
27. 27.🌈 Which colour is #ff0000? (a) white (b) cyan (c) red (d) magenta
28. 28.🌈 Which hex code is blue? (a) #00ffff (b) #0000ff (c) #000000 (d) #ffffff
29. 29.🌈 In #000035 the blue part is the hex number 35. What is it as a normal number?
30. 30.🌈 Which colour is #ffffff? (a) yellow (b) white (c) red (d) cyan
31. 31.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) white (c) black (d) magenta
32. 32.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) magenta (c) bright green (d) black
33. 33.🌈 Which colour of light is strongest in rgb(248, 60, 72)? (a) red (b) green (c) blue
34. 34.🌈 In #000070 the blue part is the hex number 70. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(229, 21, 17)? (a) green (b) red (c) blue
36. 36.🌈 Which colour of light is strongest in rgb(205, 59, 126)? (a) green (b) blue (c) red
37. 37.🌈 Which colour of light is strongest in rgb(102, 85, 249)? (a) green (b) red (c) blue
38. 38.🌈 Which colour is #ff00ff? (a) black (b) blue (c) bright green (d) magenta
39. 39.🌈 Which colour of light is strongest in rgb(33, 5, 168)? (a) blue (b) red (c) green
40. 40.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) magenta (c) yellow (d) bright green

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