CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 92 · 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.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) blue (d) black
2. 2.🌈 Which colour is #ffff00? (a) white (b) yellow (c) red (d) bright green
3. 3.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) blue (c) yellow (d) red
4. 4.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 255 (d) 1000
5. 5.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) bright green (c) magenta (d) white
6. 6.🌈 In #3a0000 the red part is the hex number 3a. What is it as a normal number?
7. 7.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) G (d) Z
8. 8.🌈 Which hex code is cyan? (a) #ffffff (b) #00ffff (c) #0000ff (d) #ff00ff
9. 9.🌈 In #0000ac the blue part is the hex number ac. What is it as a normal number?
10. 10.🌈 Which colour is #000000? (a) cyan (b) black (c) bright green (d) white
11. 11.🌈 In #0000a4 the blue part is the hex number a4. What is it as a normal number?
12. 12.🌈 Which hex code is blue? (a) #ff0000 (b) #0000ff (c) #ff00ff (d) #00ff00
13. 13.🌈 In #0000a6 the blue part is the hex number a6. What is it as a normal number?
14. 14.🌈 Which colour is #00ff00? (a) yellow (b) black (c) magenta (d) bright green
15. 15.🌈 In #7e0000 the red part is the hex number 7e. What is it as a normal number?
16. 16.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) red (d) white
17. 17.🌈 Which colour of light is strongest in rgb(64, 104, 206)? (a) green (b) red (c) blue
18. 18.🌈 Which colour of light is strongest in rgb(168, 79, 20)? (a) blue (b) red (c) green
19. 19.🌈 Which colour is #ffffff? (a) red (b) cyan (c) white (d) bright green
20. 20.🌈 Which colour of light is strongest in rgb(88, 136, 193)? (a) green (b) blue (c) red
21. 21.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 2 (d) 3
22. 22.🌈 Which hex code is bright green? (a) #000000 (b) #00ff00 (c) #ffff00 (d) #0000ff
23. 23.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) magenta (c) cyan (d) red
24. 24.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) cyan (c) yellow (d) white
25. 25.🌈 Which hex code is yellow? (a) #ffffff (b) #00ffff (c) #0000ff (d) #ffff00
26. 26.🌈 Which colour of light is strongest in rgb(250, 11, 32)? (a) green (b) red (c) blue
27. 27.🌈 Which colour of light is strongest in rgb(52, 236, 75)? (a) red (b) blue (c) green
28. 28.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) bright green (c) white (d) blue
29. 29.🌈 Which colour of light is strongest in rgb(3, 202, 1)? (a) red (b) green (c) blue
30. 30.🌈 Which hex code is red? (a) #ffff00 (b) #ff00ff (c) #000000 (d) #ff0000
31. 31.🌈 Which hex code is magenta? (a) #ff00ff (b) #00ffff (c) #000000 (d) #ff0000
32. 32.🌈 Which colour is #0000ff? (a) white (b) bright green (c) magenta (d) blue
33. 33.🌈 Which colour is #00ffff? (a) white (b) bright green (c) cyan (d) blue
34. 34.🌈 In #00001a the blue part is the hex number 1a. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(132, 55, 174)? (a) blue (b) red (c) green
36. 36.🌈 Which colour of light is strongest in rgb(253, 25, 140)? (a) blue (b) green (c) red
37. 37.🌈 In #dc0000 the red part is the hex number dc. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(39, 200, 57)? (a) green (b) red (c) blue
39. 39.🌈 In #002700 the green part is the hex number 27. What is it as a normal number?
40. 40.🌈 In #a20000 the red part is the hex number a2. What is it as a normal number?

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