CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 192 · 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 red? (a) #000000 (b) #ffff00 (c) #00ffff (d) #ff0000
2. 2.🌈 Which colour of light is strongest in rgb(20, 240, 23)? (a) red (b) green (c) blue
3. 3.🌈 Which colour of light is strongest in rgb(60, 131, 228)? (a) red (b) green (c) blue
4. 4.🌈 Which hex code is bright green? (a) #ffff00 (b) #ffffff (c) #ff0000 (d) #00ff00
5. 5.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) Z (d) J
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green
7. 7.🌈 Which colour is #000000? (a) red (b) white (c) black (d) bright green
8. 8.🌈 Which colour of light is strongest in rgb(104, 103, 248)? (a) green (b) blue (c) red
9. 9.🌈 Which colour of light is strongest in rgb(130, 236, 34)? (a) green (b) red (c) blue
10. 10.🌈 In #510000 the red part is the hex number 51. What is it as a normal number?
11. 11.🌈 Which hex code is blue? (a) #00ffff (b) #ff0000 (c) #ffffff (d) #0000ff
12. 12.🌈 Which colour is #00ff00? (a) white (b) black (c) cyan (d) bright green
13. 13.🌈 Which colour of light is strongest in rgb(3, 11, 160)? (a) green (b) red (c) blue
14. 14.🌈 Which colour is #ffff00? (a) magenta (b) bright green (c) white (d) yellow
15. 15.🌈 Which colour of light is strongest in rgb(253, 79, 41)? (a) red (b) green (c) blue
16. 16.🌈 Which hex code is cyan? (a) #ffff00 (b) #00ffff (c) #000000 (d) #00ff00
17. 17.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) yellow (c) red (d) blue
18. 18.🌈 Which colour of light is strongest in rgb(3, 97, 176)? (a) green (b) blue (c) red
19. 19.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) red (c) cyan (d) magenta
20. 20.🌈 Which hex code is magenta? (a) #ff0000 (b) #00ff00 (c) #ff00ff (d) #00ffff
21. 21.🌈 Which colour of light is strongest in rgb(3, 220, 52)? (a) red (b) blue (c) green
22. 22.🌈 Which colour of light is strongest in rgb(192, 43, 27)? (a) blue (b) green (c) red
23. 23.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) black (c) bright green (d) blue
24. 24.🌈 Which colour of light is strongest in rgb(57, 246, 136)? (a) red (b) green (c) blue
25. 25.🌈 Which colour of light is strongest in rgb(44, 240, 65)? (a) blue (b) red (c) green
26. 26.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 4 (d) 6
27. 27.🌈 Which colour of light is strongest in rgb(25, 2, 212)? (a) green (b) red (c) blue
28. 28.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) black (c) blue (d) green
29. 29.🌈 Which colour is #ff00ff? (a) bright green (b) black (c) blue (d) magenta
30. 30.🌈 Which hex code is yellow? (a) #00ffff (b) #00ff00 (c) #ffff00 (d) #ff00ff
31. 31.🌈 In #0000d0 the blue part is the hex number d0. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(14, 52, 216)? (a) green (b) blue (c) red
33. 33.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) red (c) blue (d) bright green
34. 34.🌈 Which colour is #0000ff? (a) red (b) blue (c) magenta (d) black
35. 35.🌈 Which colour is #ff0000? (a) black (b) red (c) yellow (d) white
36. 36.🌈 Which colour of light is strongest in rgb(132, 83, 160)? (a) green (b) red (c) blue
37. 37.🌈 In #5e0000 the red part is the hex number 5e. What is it as a normal number?
38. 38.🌈 In #0b0000 the red part is the hex number 0b. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(6, 229, 5)? (a) green (b) red (c) blue
40. 40.🌈 Which colour is #00ffff? (a) yellow (b) red (c) cyan (d) magenta

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