CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 369 · 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(26, 16, 254)? (a) green (b) red (c) blue
2. 2.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 4 (d) 3
3. 3.🌈 Which colour of light is strongest in rgb(4, 221, 109)? (a) blue (b) red (c) green
4. 4.🌈 Which colour of light is strongest in rgb(102, 227, 89)? (a) green (b) blue (c) red
5. 5.🌈 Which colour of light is strongest in rgb(162, 92, 95)? (a) green (b) red (c) blue
6. 6.🌈 Which colour of light is strongest in rgb(138, 222, 119)? (a) red (b) green (c) blue
7. 7.🌈 Which colour of light is strongest in rgb(167, 14, 45)? (a) green (b) red (c) blue
8. 8.🌈 Which colour of light is strongest in rgb(44, 110, 168)? (a) blue (b) red (c) green
9. 9.🌈 In #000023 the blue part is the hex number 23. What is it as a normal number?
10. 10.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
11. 11.🌈 Which colour of light is strongest in rgb(216, 36, 25)? (a) green (b) red (c) blue
12. 12.🌈 Which colour is #ff00ff? (a) bright green (b) black (c) magenta (d) white
13. 13.🌈 Which colour of light is strongest in rgb(45, 213, 134)? (a) red (b) blue (c) green
14. 14.🌈 Which colour is #00ff00? (a) red (b) bright green (c) cyan (d) white
15. 15.🌈 In #00d000 the green part is the hex number d0. What is it as a normal number?
16. 16.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 255 (c) 100 (d) 99
17. 17.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) red (c) black (d) blue
18. 18.🌈 Which hex code is white? (a) #00ffff (b) #ff0000 (c) #000000 (d) #ffffff
19. 19.🌈 Which hex code is magenta? (a) #000000 (b) #ff00ff (c) #0000ff (d) #ffff00
20. 20.🌈 In #000035 the blue part is the hex number 35. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(201, 8, 70)? (a) blue (b) green (c) red
22. 22.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green
23. 23.🌈 In #8d0000 the red part is the hex number 8d. What is it as a normal number?
24. 24.🌈 Which colour is #000000? (a) blue (b) magenta (c) black (d) bright green
25. 25.🌈 Which colour of light is strongest in rgb(204, 120, 34)? (a) red (b) blue (c) green
26. 26.🌈 Which colour is #0000ff? (a) red (b) yellow (c) cyan (d) blue
27. 27.🌈 Which hex code is yellow? (a) #000000 (b) #ffffff (c) #ff0000 (d) #ffff00
28. 28.🌈 Which colour of light is strongest in rgb(31, 126, 176)? (a) red (b) blue (c) green
29. 29.🌈 Which hex code is cyan? (a) #0000ff (b) #00ffff (c) #ff0000 (d) #ffffff
30. 30.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) red (c) magenta (d) blue
31. 31.🌈 In #00001b the blue part is the hex number 1b. What is it as a normal number?
32. 32.🌈 Which colour is #ffff00? (a) blue (b) red (c) black (d) yellow
33. 33.🌈 Which hex code is red? (a) #00ff00 (b) #ff0000 (c) #000000 (d) #ffff00
34. 34.🌈 Which colour of light is strongest in rgb(166, 63, 64)? (a) green (b) red (c) blue
35. 35.🌈 Which colour of light is strongest in rgb(248, 86, 100)? (a) blue (b) green (c) red
36. 36.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) Z (d) G
37. 37.🌈 Which colour is #ff0000? (a) blue (b) black (c) white (d) red
38. 38.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) white (c) cyan (d) bright green
39. 39.🌈 Which hex code is bright green? (a) #0000ff (b) #000000 (c) #ffff00 (d) #00ff00
40. 40.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) magenta (c) white (d) red

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