CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 273 · 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 #0000ff? (a) magenta (b) black (c) blue (d) red
2. 2.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) green (c) red (d) blue
3. 3.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z
4. 4.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) white (c) bright green (d) yellow
5. 5.🌈 In #fb0000 the red part is the hex number fb. What is it as a normal number?
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) blue (d) green
7. 7.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) magenta (c) white (d) red
8. 8.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) red (c) cyan (d) magenta
9. 9.🌈 Which colour is #ffff00? (a) magenta (b) bright green (c) yellow (d) red
10. 10.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) red (c) cyan (d) blue
11. 11.🌈 Which hex code is yellow? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ffff00
12. 12.🌈 Which colour of light is strongest in rgb(2, 127, 196)? (a) red (b) blue (c) green
13. 13.🌈 Which hex code is black? (a) #ffffff (b) #00ffff (c) #000000 (d) #00ff00
14. 14.🌈 Which hex code is bright green? (a) #ffffff (b) #00ff00 (c) #ffff00 (d) #00ffff
15. 15.🌈 Which colour is #ff0000? (a) blue (b) black (c) cyan (d) red
16. 16.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 4 (c) 3 (d) 2
17. 17.🌈 In #000055 the blue part is the hex number 55. What is it as a normal number?
18. 18.🌈 Which hex code is cyan? (a) #ff0000 (b) #00ffff (c) #0000ff (d) #ff00ff
19. 19.🌈 Which colour of light is strongest in rgb(216, 55, 1)? (a) green (b) blue (c) red
20. 20.🌈 Which colour of light is strongest in rgb(38, 171, 55)? (a) green (b) red (c) blue
21. 21.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 99 (d) 255
22. 22.🌈 Which colour of light is strongest in rgb(46, 19, 172)? (a) blue (b) red (c) green
23. 23.🌈 In #a30000 the red part is the hex number a3. What is it as a normal number?
24. 24.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #ff0000 (d) #ff00ff
25. 25.🌈 In #2d0000 the red part is the hex number 2d. What is it as a normal number?
26. 26.🌈 In #0000ba the blue part is the hex number ba. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(54, 243, 133)? (a) green (b) blue (c) red
28. 28.🌈 Which colour of light is strongest in rgb(57, 7, 155)? (a) red (b) blue (c) green
29. 29.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) blue (c) cyan (d) yellow
30. 30.🌈 In #0000ea the blue part is the hex number ea. What is it as a normal number?
31. 31.🌈 In #cb0000 the red part is the hex number cb. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(128, 68, 209)? (a) green (b) red (c) blue
33. 33.🌈 In #f20000 the red part is the hex number f2. What is it as a normal number?
34. 34.🌈 Which colour of light is strongest in rgb(12, 177, 97)? (a) red (b) blue (c) green
35. 35.🌈 Which colour of light is strongest in rgb(30, 6, 151)? (a) red (b) blue (c) green
36. 36.🌈 Which hex code is red? (a) #0000ff (b) #ff0000 (c) #ffff00 (d) #00ffff
37. 37.🌈 Which colour of light is strongest in rgb(8, 165, 80)? (a) blue (b) green (c) red
38. 38.🌈 Which colour of light is strongest in rgb(35, 92, 203)? (a) green (b) red (c) blue
39. 39.🌈 In #1b0000 the red part is the hex number 1b. What is it as a normal number?
40. 40.🌈 In #000013 the blue part is the hex number 13. What is it as a normal number?

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