CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 360 · 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 #ff00ff? (a) blue (b) cyan (c) magenta (d) bright green
2. 2.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
3. 3.🌈 Which colour is rgb(0, 255, 255)? (a) magenta (b) white (c) red (d) cyan
4. 4.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) bright green (c) white (d) magenta
5. 5.🌈 Which colour is #ffffff? (a) red (b) white (c) magenta (d) yellow
6. 6.🌈 Which colour is #00ff00? (a) yellow (b) blue (c) white (d) bright green
7. 7.🌈 Which colour of light is strongest in rgb(79, 154, 63)? (a) blue (b) red (c) green
8. 8.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) F (d) Z
9. 9.🌈 Which colour is #ff0000? (a) black (b) blue (c) red (d) white
10. 10.🌈 In #a10000 the red part is the hex number a1. What is it as a normal number?
11. 11.🌈 Which hex code is white? (a) #00ffff (b) #00ff00 (c) #ff00ff (d) #ffffff
12. 12.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) bright green (c) blue (d) cyan
13. 13.🌈 Which colour is #000000? (a) cyan (b) blue (c) magenta (d) black
14. 14.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) green (d) black
15. 15.🌈 In #280000 the red part is the hex number 28. What is it as a normal number?
16. 16.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 1000 (d) 99
17. 17.🌈 In #002600 the green part is the hex number 26. What is it as a normal number?
18. 18.🌈 Which hex code is blue? (a) #0000ff (b) #ff00ff (c) #ffffff (d) #ff0000
19. 19.🌈 In #00e700 the green part is the hex number e7. What is it as a normal number?
20. 20.🌈 Which hex code is magenta? (a) #ff0000 (b) #ff00ff (c) #ffffff (d) #000000
21. 21.🌈 Which colour is #00ffff? (a) cyan (b) red (c) magenta (d) yellow
22. 22.🌈 In #00005b the blue part is the hex number 5b. What is it as a normal number?
23. 23.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) white (c) yellow (d) red
24. 24.🌈 Which hex code is cyan? (a) #00ffff (b) #ff00ff (c) #ffff00 (d) #00ff00
25. 25.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) red (c) magenta (d) bright green
26. 26.🌈 In #0000f1 the blue part is the hex number f1. What is it as a normal number?
27. 27.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) red (c) blue (d) black
28. 28.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) blue (c) white (d) cyan
29. 29.🌈 Which colour of light is strongest in rgb(126, 115, 211)? (a) blue (b) green (c) red
30. 30.🌈 Which colour of light is strongest in rgb(178, 68, 25)? (a) green (b) blue (c) red
31. 31.🌈 Which hex code is bright green? (a) #000000 (b) #ffff00 (c) #ff0000 (d) #00ff00
32. 32.🌈 Which colour of light is strongest in rgb(45, 17, 219)? (a) green (b) red (c) blue
33. 33.🌈 Which hex code is black? (a) #000000 (b) #0000ff (c) #ffffff (d) #ffff00
34. 34.🌈 In #00002a the blue part is the hex number 2a. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(84, 223, 50)? (a) red (b) blue (c) green
36. 36.🌈 Which colour of light is strongest in rgb(207, 115, 63)? (a) red (b) blue (c) green
37. 37.🌈 Which colour is #ffff00? (a) red (b) magenta (c) yellow (d) blue
38. 38.🌈 Which colour of light is strongest in rgb(79, 218, 90)? (a) red (b) green (c) blue
39. 39.🌈 Which colour is #0000ff? (a) black (b) blue (c) white (d) bright green
40. 40.🌈 In #2b0000 the red part is the hex number 2b. What is it as a normal number?

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