CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 189 · 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 hex code is black? (a) #ff0000 (b) #0000ff (c) #000000 (d) #ffffff
2. 2.🌈 In #8e0000 the red part is the hex number 8e. What is it as a normal number?
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 #ff00ff? (a) cyan (b) blue (c) magenta (d) bright green
5. 5.🌈 Which colour is #ff0000? (a) magenta (b) blue (c) red (d) yellow
6. 6.🌈 Which colour of light is strongest in rgb(68, 197, 133)? (a) red (b) blue (c) green
7. 7.🌈 In #f10000 the red part is the hex number f1. What is it as a normal number?
8. 8.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 4 (d) 6
9. 9.🌈 Which colour is #00ff00? (a) bright green (b) red (c) white (d) blue
10. 10.🌈 Which colour of light is strongest in rgb(239, 122, 113)? (a) blue (b) green (c) red
11. 11.🌈 Which hex code is red? (a) #ffff00 (b) #0000ff (c) #000000 (d) #ff0000
12. 12.🌈 Which colour of light is strongest in rgb(227, 99, 87)? (a) red (b) green (c) blue
13. 13.🌈 Which colour is #ffff00? (a) yellow (b) bright green (c) blue (d) white
14. 14.🌈 Which colour of light is strongest in rgb(99, 184, 0)? (a) green (b) red (c) blue
15. 15.🌈 Which hex code is bright green? (a) #ffff00 (b) #ffffff (c) #ff00ff (d) #00ff00
16. 16.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 100 (d) 1000
17. 17.🌈 Which colour is #000000? (a) red (b) bright green (c) black (d) blue
18. 18.🌈 Which colour is #00ffff? (a) magenta (b) cyan (c) black (d) bright green
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) white (c) magenta (d) blue
20. 20.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) cyan (c) white (d) red
21. 21.🌈 Which colour of light is strongest in rgb(189, 101, 113)? (a) green (b) red (c) blue
22. 22.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) G (c) Z (d) J
23. 23.🌈 In #6e0000 the red part is the hex number 6e. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(211, 100, 136)? (a) green (b) red (c) blue
25. 25.🌈 In #000036 the blue part is the hex number 36. What is it as a normal number?
26. 26.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) blue (c) green (d) red
27. 27.🌈 In #00fe00 the green part is the hex number fe. What is it as a normal number?
28. 28.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) white (c) magenta (d) yellow
29. 29.🌈 Which hex code is magenta? (a) #ff0000 (b) #ffffff (c) #ff00ff (d) #0000ff
30. 30.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) magenta (c) black (d) bright green
31. 31.🌈 Which colour is rgb(255, 0, 255)? (a) bright green (b) magenta (c) red (d) black
32. 32.🌈 Which colour of light is strongest in rgb(173, 30, 136)? (a) blue (b) red (c) green
33. 33.🌈 Which colour of light is strongest in rgb(248, 32, 132)? (a) blue (b) green (c) red
34. 34.🌈 In #004600 the green part is the hex number 46. What is it as a normal number?
35. 35.🌈 Which hex code is yellow? (a) #00ffff (b) #ffff00 (c) #ff0000 (d) #00ff00
36. 36.🌈 Which colour is #ffffff? (a) cyan (b) bright green (c) white (d) blue
37. 37.🌈 Which hex code is cyan? (a) #0000ff (b) #00ffff (c) #ffffff (d) #ff0000
38. 38.🌈 In #000058 the blue part is the hex number 58. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(170, 46, 123)? (a) red (b) blue (c) green
40. 40.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) magenta (c) black (d) yellow

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