CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 75 · 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 hex code is white? (a) #00ff00 (b) #000000 (c) #ff0000 (d) #ffffff
2. 2.🌈 Which colour is #ff0000? (a) cyan (b) black (c) red (d) magenta
3. 3.🌈 Which colour of light is strongest in rgb(133, 248, 120)? (a) blue (b) red (c) green
4. 4.🌈 In #3b0000 the red part is the hex number 3b. What is it as a normal number?
5. 5.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
6. 6.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) white (c) magenta (d) bright green
7. 7.🌈 Which hex code is bright green? (a) #ff00ff (b) #00ff00 (c) #0000ff (d) #ff0000
8. 8.🌈 Which colour of light is strongest in rgb(59, 45, 184)? (a) red (b) blue (c) green
9. 9.🌈 In #0000a6 the blue part is the hex number a6. What is it as a normal number?
10. 10.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) yellow (c) cyan (d) red
11. 11.🌈 Which hex code is yellow? (a) #00ffff (b) #ffff00 (c) #ffffff (d) #0000ff
12. 12.🌈 Which colour is #ffff00? (a) blue (b) cyan (c) yellow (d) magenta
13. 13.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) bright green (c) white (d) cyan
14. 14.🌈 Which colour of light is strongest in rgb(34, 6, 150)? (a) red (b) green (c) blue
15. 15.🌈 Which hex code is blue? (a) #00ffff (b) #0000ff (c) #ffffff (d) #ffff00
16. 16.🌈 Which colour is #00ff00? (a) cyan (b) blue (c) magenta (d) bright green
17. 17.🌈 In #4a0000 the red part is the hex number 4a. What is it as a normal number?
18. 18.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
19. 19.🌈 In #4d0000 the red part is the hex number 4d. What is it as a normal number?
20. 20.🌈 Which hex code is cyan? (a) #0000ff (b) #000000 (c) #00ffff (d) #ffff00
21. 21.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) cyan (c) black (d) yellow
22. 22.🌈 In #6a0000 the red part is the hex number 6a. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(134, 129, 250)? (a) green (b) blue (c) red
24. 24.🌈 Which colour of light is strongest in rgb(101, 106, 207)? (a) blue (b) red (c) green
25. 25.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) black (d) red
26. 26.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z
27. 27.🌈 Which colour of light is strongest in rgb(114, 178, 34)? (a) red (b) green (c) blue
28. 28.🌈 In #000059 the blue part is the hex number 59. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(129, 94, 200)? (a) green (b) red (c) blue
30. 30.🌈 In #001500 the green part is the hex number 15. What is it as a normal number?
31. 31.🌈 Which colour is #00ffff? (a) cyan (b) yellow (c) red (d) bright green
32. 32.🌈 Which colour of light is strongest in rgb(160, 11, 36)? (a) blue (b) green (c) red
33. 33.🌈 Which hex code is red? (a) #00ff00 (b) #ff0000 (c) #00ffff (d) #000000
34. 34.🌈 Which colour of light is strongest in rgb(28, 255, 31)? (a) red (b) green (c) blue
35. 35.🌈 Which colour of light is strongest in rgb(53, 134, 218)? (a) red (b) blue (c) green
36. 36.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) bright green (c) magenta (d) yellow
37. 37.🌈 In #000063 the blue part is the hex number 63. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(96, 7, 154)? (a) green (b) blue (c) red
39. 39.🌈 Which colour is #ff00ff? (a) magenta (b) red (c) white (d) yellow
40. 40.🌈 In #000028 the blue part is the hex number 28. What is it as a normal number?

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