CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 326 · 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 rgb(0, 255, 0)? (a) yellow (b) bright green (c) blue (d) white
2. 2.🌈 Which colour is #00ff00? (a) cyan (b) bright green (c) red (d) blue
3. 3.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) green (d) red
4. 4.🌈 Which colour is #ff0000? (a) red (b) magenta (c) bright green (d) white
5. 5.🌈 Which colour is #ffffff? (a) black (b) bright green (c) white (d) blue
6. 6.🌈 Which hex code is blue? (a) #ff00ff (b) #00ffff (c) #ffffff (d) #0000ff
7. 7.🌈 Which hex code is red? (a) #ffff00 (b) #0000ff (c) #00ff00 (d) #ff0000
8. 8.🌈 In #790000 the red part is the hex number 79. What is it as a normal number?
9. 9.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) magenta (c) bright green (d) blue
10. 10.🌈 In #002900 the green part is the hex number 29. What is it as a normal number?
11. 11.🌈 In #006900 the green part is the hex number 69. What is it as a normal number?
12. 12.🌈 In #000050 the blue part is the hex number 50. What is it as a normal number?
13. 13.🌈 In #2c0000 the red part is the hex number 2c. What is it as a normal number?
14. 14.🌈 In #002a00 the green part is the hex number 2a. What is it as a normal number?
15. 15.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) G (c) J (d) Z
16. 16.🌈 Which colour is #ffff00? (a) red (b) black (c) bright green (d) yellow
17. 17.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) black (c) red (d) cyan
18. 18.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) cyan (c) black (d) blue
19. 19.🌈 Which colour of light is strongest in rgb(28, 247, 76)? (a) red (b) blue (c) green
20. 20.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) magenta (c) black (d) white
21. 21.🌈 In #000093 the blue part is the hex number 93. What is it as a normal number?
22. 22.🌈 In #0000f2 the blue part is the hex number f2. What is it as a normal number?
23. 23.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) blue (c) yellow (d) bright green
24. 24.🌈 Which hex code is magenta? (a) #ff00ff (b) #ffff00 (c) #000000 (d) #0000ff
25. 25.🌈 In #007f00 the green part is the hex number 7f. What is it as a normal number?
26. 26.🌈 In #001a00 the green part is the hex number 1a. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(40, 179, 103)? (a) blue (b) green (c) red
28. 28.🌈 In #001e00 the green part is the hex number 1e. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(139, 128, 166)? (a) red (b) blue (c) green
30. 30.🌈 Which colour is #00ffff? (a) yellow (b) blue (c) cyan (d) red
31. 31.🌈 In #00f500 the green part is the hex number f5. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(150, 135, 124)? (a) red (b) blue (c) green
33. 33.🌈 Which colour is #ff00ff? (a) magenta (b) bright green (c) blue (d) cyan
34. 34.🌈 Which hex code is white? (a) #00ffff (b) #ff0000 (c) #ff00ff (d) #ffffff
35. 35.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 3 (c) 2 (d) 6
36. 36.🌈 In #0000ae the blue part is the hex number ae. What is it as a normal number?
37. 37.🌈 In #000017 the blue part is the hex number 17. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(182, 121, 34)? (a) blue (b) green (c) red
39. 39.🌈 Which colour of light is strongest in rgb(127, 155, 91)? (a) red (b) blue (c) green
40. 40.🌈 In #000059 the blue part is the hex number 59. What is it as a normal number?

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