CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 309 · 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(74, 10, 253)? (a) red (b) blue (c) green
2. 2.🌈 Which colour is #0000ff? (a) bright green (b) cyan (c) black (d) blue
3. 3.🌈 Which colour is #00ff00? (a) white (b) magenta (c) bright green (d) blue
4. 4.🌈 Which colour is rgb(255, 255, 0)? (a) cyan (b) yellow (c) black (d) red
5. 5.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) J (c) F (d) G
6. 6.🌈 Which colour is #ff0000? (a) bright green (b) cyan (c) black (d) red
7. 7.🌈 In #810000 the red part is the hex number 81. What is it as a normal number?
8. 8.🌈 Which colour is #ffffff? (a) cyan (b) black (c) red (d) white
9. 9.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
10. 10.🌈 Which hex code is yellow? (a) #00ff00 (b) #000000 (c) #ffff00 (d) #00ffff
11. 11.🌈 Which hex code is blue? (a) #ffff00 (b) #0000ff (c) #000000 (d) #00ff00
12. 12.🌈 Which colour is #000000? (a) blue (b) black (c) bright green (d) yellow
13. 13.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) white (c) magenta (d) black
14. 14.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) black (c) magenta (d) bright green
15. 15.🌈 Which hex code is red? (a) #ff0000 (b) #ffffff (c) #000000 (d) #ff00ff
16. 16.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 255 (c) 1000 (d) 99
17. 17.🌈 Which colour is rgb(255, 0, 0)? (a) magenta (b) red (c) cyan (d) bright green
18. 18.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
19. 19.🌈 Which colour is #00ffff? (a) cyan (b) white (c) red (d) magenta
20. 20.🌈 Which colour of light is strongest in rgb(154, 118, 53)? (a) red (b) green (c) blue
21. 21.🌈 In #000060 the blue part is the hex number 60. What is it as a normal number?
22. 22.🌈 In #640000 the red part is the hex number 64. What is it as a normal number?
23. 23.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) cyan (c) magenta (d) yellow
24. 24.🌈 In #000045 the blue part is the hex number 45. What is it as a normal number?
25. 25.🌈 Which colour of light is strongest in rgb(60, 102, 236)? (a) green (b) blue (c) red
26. 26.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) white (c) magenta (d) yellow
27. 27.🌈 In #0000a4 the blue part is the hex number a4. What is it as a normal number?
28. 28.🌈 In #003700 the green part is the hex number 37. What is it as a normal number?
29. 29.🌈 In #0000c7 the blue part is the hex number c7. What is it as a normal number?
30. 30.🌈 In #180000 the red part is the hex number 18. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(212, 25, 104)? (a) red (b) green (c) blue
32. 32.🌈 Which hex code is magenta? (a) #ff00ff (b) #00ffff (c) #0000ff (d) #ffff00
33. 33.🌈 Which hex code is black? (a) #ff00ff (b) #ffff00 (c) #ff0000 (d) #000000
34. 34.🌈 Which colour of light is strongest in rgb(236, 108, 80)? (a) blue (b) green (c) red
35. 35.🌈 Which colour of light is strongest in rgb(163, 135, 23)? (a) green (b) red (c) blue
36. 36.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 6 (d) 3
37. 37.🌈 Which colour of light is strongest in rgb(169, 37, 114)? (a) green (b) red (c) blue
38. 38.🌈 In #0000a0 the blue part is the hex number a0. What is it as a normal number?
39. 39.🌈 In #009500 the green part is the hex number 95. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(118, 53, 238)? (a) blue (b) red (c) green

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