CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 358 · 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(130, 220, 104)? (a) red (b) blue (c) green
2. 2.🌈 Which colour is #ffffff? (a) black (b) yellow (c) red (d) white
3. 3.🌈 Which hex code is blue? (a) #ff00ff (b) #00ffff (c) #00ff00 (d) #0000ff
4. 4.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) white (c) blue (d) red
5. 5.🌈 In #008300 the green part is the hex number 83. What is it as a normal number?
6. 6.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) Z (c) G (d) F
7. 7.🌈 In #006a00 the green part is the hex number 6a. What is it as a normal number?
8. 8.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) magenta (c) red (d) blue
9. 9.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
10. 10.🌈 Which colour is #ff00ff? (a) black (b) magenta (c) bright green (d) white
11. 11.🌈 In #2e0000 the red part is the hex number 2e. What is it as a normal number?
12. 12.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) blue (d) white
13. 13.🌈 In #a20000 the red part is the hex number a2. What is it as a normal number?
14. 14.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 3 (d) 6
15. 15.🌈 Which colour of light is strongest in rgb(220, 97, 59)? (a) blue (b) red (c) green
16. 16.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) bright green (c) magenta (d) blue
17. 17.🌈 Which colour of light is strongest in rgb(183, 30, 117)? (a) green (b) blue (c) red
18. 18.🌈 In #0000ad the blue part is the hex number ad. What is it as a normal number?
19. 19.🌈 Which hex code is red? (a) #0000ff (b) #00ff00 (c) #ff0000 (d) #ffffff
20. 20.🌈 In #0000d4 the blue part is the hex number d4. What is it as a normal number?
21. 21.🌈 Which hex code is white? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ff00ff
22. 22.🌈 Which colour is #000000? (a) blue (b) black (c) bright green (d) magenta
23. 23.🌈 Which hex code is black? (a) #0000ff (b) #00ff00 (c) #ffffff (d) #000000
24. 24.🌈 Which hex code is cyan? (a) #000000 (b) #00ffff (c) #ff00ff (d) #00ff00
25. 25.🌈 Which colour of light is strongest in rgb(178, 124, 70)? (a) green (b) blue (c) red
26. 26.🌈 Which colour of light is strongest in rgb(197, 95, 12)? (a) green (b) red (c) blue
27. 27.🌈 Which hex code is yellow? (a) #000000 (b) #ff0000 (c) #ffff00 (d) #0000ff
28. 28.🌈 Which colour of light is strongest in rgb(184, 73, 64)? (a) blue (b) red (c) green
29. 29.🌈 Which hex code is bright green? (a) #00ff00 (b) #000000 (c) #00ffff (d) #ffff00
30. 30.🌈 Which colour is #ffff00? (a) white (b) blue (c) red (d) yellow
31. 31.🌈 In #00003f the blue part is the hex number 3f. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(41, 224, 99)? (a) blue (b) green (c) red
33. 33.🌈 In #000014 the blue part is the hex number 14. What is it as a normal number?
34. 34.🌈 Which colour is #00ff00? (a) bright green (b) red (c) cyan (d) yellow
35. 35.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) cyan (c) yellow (d) white
36. 36.🌈 Which colour of light is strongest in rgb(250, 47, 86)? (a) blue (b) green (c) red
37. 37.🌈 Which colour of light is strongest in rgb(127, 10, 158)? (a) red (b) blue (c) green
38. 38.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) red (c) blue (d) cyan
39. 39.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) magenta (c) white (d) red
40. 40.🌈 In #00005f the blue part is the hex number 5f. What is it as a normal number?

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