CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 269 · 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.🌈 In #00008c the blue part is the hex number 8c. What is it as a normal number?
2. 2.🌈 Which colour is #ff00ff? (a) black (b) white (c) magenta (d) cyan
3. 3.🌈 Which hex code is red? (a) #ff00ff (b) #0000ff (c) #00ffff (d) #ff0000
4. 4.🌈 Which colour of light is strongest in rgb(4, 203, 24)? (a) blue (b) red (c) green
5. 5.🌈 Which colour is #00ff00? (a) bright green (b) blue (c) cyan (d) red
6. 6.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) J (d) F
7. 7.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) blue (d) red
8. 8.🌈 Which colour is #ffff00? (a) magenta (b) black (c) red (d) yellow
9. 9.🌈 Which hex code is blue? (a) #ffff00 (b) #0000ff (c) #ff0000 (d) #ff00ff
10. 10.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) cyan (c) white (d) black
11. 11.🌈 Which colour is #00ffff? (a) yellow (b) cyan (c) bright green (d) red
12. 12.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) yellow (c) red (d) white
13. 13.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) cyan (c) white (d) yellow
14. 14.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) green (c) blue (d) red
15. 15.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 255 (d) 100
16. 16.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) bright green (c) red (d) white
17. 17.🌈 Which colour of light is strongest in rgb(230, 116, 22)? (a) red (b) blue (c) green
18. 18.🌈 Which colour of light is strongest in rgb(2, 208, 79)? (a) red (b) blue (c) green
19. 19.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) cyan (c) white (d) yellow
20. 20.🌈 Which colour is #ffffff? (a) yellow (b) black (c) bright green (d) white
21. 21.🌈 In #0000f9 the blue part is the hex number f9. What is it as a normal number?
22. 22.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ff00 (c) #00ffff (d) #0000ff
23. 23.🌈 Which colour of light is strongest in rgb(127, 135, 180)? (a) red (b) blue (c) green
24. 24.🌈 In #5a0000 the red part is the hex number 5a. What is it as a normal number?
25. 25.🌈 Which hex code is magenta? (a) #ff00ff (b) #ff0000 (c) #ffffff (d) #00ffff
26. 26.🌈 In #006d00 the green part is the hex number 6d. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(20, 210, 53)? (a) green (b) blue (c) red
28. 28.🌈 Which colour of light is strongest in rgb(95, 7, 165)? (a) green (b) red (c) blue
29. 29.🌈 In #007b00 the green part is the hex number 7b. What is it as a normal number?
30. 30.🌈 Which hex code is white? (a) #0000ff (b) #00ffff (c) #ffff00 (d) #ffffff
31. 31.🌈 In #0000c3 the blue part is the hex number c3. What is it as a normal number?
32. 32.🌈 In #0000ad the blue part is the hex number ad. What is it as a normal number?
33. 33.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) white (c) yellow (d) cyan
34. 34.🌈 Which colour of light is strongest in rgb(4, 176, 64)? (a) blue (b) green (c) red
35. 35.🌈 Which colour of light is strongest in rgb(153, 5, 7)? (a) green (b) red (c) blue
36. 36.🌈 Which colour of light is strongest in rgb(83, 61, 250)? (a) red (b) blue (c) green
37. 37.🌈 In #000061 the blue part is the hex number 61. What is it as a normal number?
38. 38.🌈 In #00dc00 the green part is the hex number dc. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(66, 162, 81)? (a) green (b) blue (c) red
40. 40.🌈 In #9e0000 the red part is the hex number 9e. What is it as a normal number?

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