CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 323 · 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 is #0000ff? (a) magenta (b) cyan (c) white (d) blue
2. 2.🌈 Which colour of light is strongest in rgb(246, 44, 123)? (a) blue (b) red (c) green
3. 3.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) green (d) black
4. 4.🌈 In #000009 the blue part is the hex number 09. What is it as a normal number?
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) blue (d) green
6. 6.🌈 In #006700 the green part is the hex number 67. What is it as a normal number?
7. 7.🌈 Which colour is rgb(0, 255, 255)? (a) magenta (b) yellow (c) black (d) cyan
8. 8.🌈 Which hex code is magenta? (a) #ff00ff (b) #00ff00 (c) #0000ff (d) #ff0000
9. 9.🌈 Which colour is #ffffff? (a) bright green (b) white (c) magenta (d) red
10. 10.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 4 (c) 3 (d) 2
11. 11.🌈 In #810000 the red part is the hex number 81. What is it as a normal number?
12. 12.🌈 Which hex code is blue? (a) #ffffff (b) #0000ff (c) #ff00ff (d) #00ff00
13. 13.🌈 Which hex code is yellow? (a) #0000ff (b) #ff0000 (c) #ffff00 (d) #ffffff
14. 14.🌈 Which colour is #00ffff? (a) cyan (b) magenta (c) red (d) black
15. 15.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) blue (c) red (d) black
16. 16.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) G (c) J (d) Z
17. 17.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 1000 (d) 100
18. 18.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) black (c) magenta (d) red
19. 19.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) blue (c) red (d) bright green
20. 20.🌈 Which colour is #000000? (a) magenta (b) black (c) white (d) red
21. 21.🌈 Which hex code is white? (a) #ffffff (b) #0000ff (c) #000000 (d) #00ff00
22. 22.🌈 Which hex code is cyan? (a) #00ff00 (b) #ff00ff (c) #00ffff (d) #0000ff
23. 23.🌈 In #b30000 the red part is the hex number b3. What is it as a normal number?
24. 24.🌈 In #000003 the blue part is the hex number 03. What is it as a normal number?
25. 25.🌈 In #00cf00 the green part is the hex number cf. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(214, 90, 19)? (a) green (b) red (c) blue
27. 27.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) bright green (c) blue (d) black
28. 28.🌈 In #220000 the red part is the hex number 22. What is it as a normal number?
29. 29.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) yellow (c) blue (d) cyan
30. 30.🌈 In #004c00 the green part is the hex number 4c. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(138, 183, 125)? (a) green (b) blue (c) red
32. 32.🌈 Which colour of light is strongest in rgb(228, 23, 50)? (a) red (b) blue (c) green
33. 33.🌈 Which hex code is red? (a) #0000ff (b) #ff0000 (c) #00ff00 (d) #000000
34. 34.🌈 In #008800 the green part is the hex number 88. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(241, 64, 59)? (a) red (b) green (c) blue
36. 36.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) yellow (c) black (d) magenta
37. 37.🌈 Which colour of light is strongest in rgb(34, 194, 95)? (a) blue (b) red (c) green
38. 38.🌈 Which colour of light is strongest in rgb(136, 213, 49)? (a) blue (b) red (c) green
39. 39.🌈 Which colour of light is strongest in rgb(179, 99, 116)? (a) green (b) blue (c) red
40. 40.🌈 Which hex code is bright green? (a) #00ff00 (b) #ff00ff (c) #ffff00 (d) #00ffff

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