CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 191 · 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 of light is strongest in rgb(226, 21, 15)? (a) blue (b) red (c) green
2. 2.🌈 Which colour is #0000ff? (a) blue (b) black (c) bright green (d) white
3. 3.🌈 Which colour is #ff00ff? (a) cyan (b) magenta (c) blue (d) yellow
4. 4.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) yellow (c) magenta (d) red
5. 5.🌈 In #0000fc the blue part is the hex number fc. What is it as a normal number?
6. 6.🌈 Which colour of light is strongest in rgb(85, 186, 41)? (a) green (b) red (c) blue
7. 7.🌈 Which colour of light is strongest in rgb(231, 26, 0)? (a) red (b) green (c) blue
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) red (d) green
9. 9.🌈 Which colour is #ff0000? (a) magenta (b) red (c) cyan (d) blue
10. 10.🌈 Which colour is rgb(255, 0, 0)? (a) magenta (b) red (c) bright green (d) black
11. 11.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) red (c) blue (d) white
12. 12.🌈 Which hex code is cyan? (a) #0000ff (b) #ff0000 (c) #00ffff (d) #ff00ff
13. 13.🌈 In #004100 the green part is the hex number 41. What is it as a normal number?
14. 14.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) J (d) Z
15. 15.🌈 Which colour is rgb(255, 0, 255)? (a) red (b) black (c) magenta (d) white
16. 16.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) cyan (c) blue (d) bright green
17. 17.🌈 Which colour of light is strongest in rgb(60, 218, 127)? (a) blue (b) red (c) green
18. 18.🌈 Which colour of light is strongest in rgb(177, 58, 25)? (a) green (b) blue (c) red
19. 19.🌈 Which colour of light is strongest in rgb(59, 239, 61)? (a) blue (b) green (c) red
20. 20.🌈 In #00b500 the green part is the hex number b5. What is it as a normal number?
21. 21.🌈 In #00da00 the green part is the hex number da. What is it as a normal number?
22. 22.🌈 Which colour of light is strongest in rgb(130, 194, 128)? (a) green (b) red (c) blue
23. 23.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
24. 24.🌈 In #008a00 the green part is the hex number 8a. What is it as a normal number?
25. 25.🌈 Which colour is #ffff00? (a) red (b) black (c) blue (d) yellow
26. 26.🌈 Which hex code is magenta? (a) #ffff00 (b) #00ffff (c) #ff00ff (d) #0000ff
27. 27.🌈 In #fb0000 the red part is the hex number fb. What is it as a normal number?
28. 28.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 255 (d) 99
29. 29.🌈 In #00bd00 the green part is the hex number bd. What is it as a normal number?
30. 30.🌈 In #00d500 the green part is the hex number d5. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(113, 32, 251)? (a) green (b) red (c) blue
32. 32.🌈 Which colour is #000000? (a) white (b) black (c) yellow (d) bright green
33. 33.🌈 Which hex code is white? (a) #000000 (b) #ffff00 (c) #ffffff (d) #0000ff
34. 34.🌈 Which colour of light is strongest in rgb(68, 58, 242)? (a) green (b) red (c) blue
35. 35.🌈 Which hex code is red? (a) #ff0000 (b) #ffffff (c) #00ff00 (d) #0000ff
36. 36.🌈 Which colour is #ffffff? (a) white (b) bright green (c) magenta (d) red
37. 37.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) magenta (c) black (d) bright green
38. 38.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) red (c) yellow (d) white
39. 39.🌈 Which colour of light is strongest in rgb(122, 72, 153)? (a) blue (b) green (c) red
40. 40.🌈 Which colour of light is strongest in rgb(195, 6, 107)? (a) green (b) red (c) blue

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