CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 271 · 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 #0e0000 the red part is the hex number 0e. What is it as a normal number?
2. 2.🌈 Which colour is rgb(0, 0, 255)? (a) red (b) yellow (c) white (d) blue
3. 3.🌈 Which colour of light is strongest in rgb(238, 34, 98)? (a) green (b) red (c) blue
4. 4.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) bright green (c) yellow (d) black
5. 5.🌈 Which colour is #ff00ff? (a) magenta (b) black (c) blue (d) cyan
6. 6.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) blue (c) magenta (d) black
7. 7.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) blue (c) black (d) yellow
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) blue (d) green
9. 9.🌈 Which hex code is blue? (a) #ffffff (b) #00ff00 (c) #0000ff (d) #ff00ff
10. 10.🌈 Which colour of light is strongest in rgb(232, 105, 111)? (a) blue (b) red (c) green
11. 11.🌈 Which hex code is red? (a) #ff0000 (b) #ffffff (c) #000000 (d) #0000ff
12. 12.🌈 Which colour of light is strongest in rgb(151, 55, 123)? (a) green (b) red (c) blue
13. 13.🌈 Which colour of light is strongest in rgb(189, 140, 28)? (a) green (b) red (c) blue
14. 14.🌈 Which colour of light is strongest in rgb(42, 180, 123)? (a) red (b) blue (c) green
15. 15.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) bright green (c) cyan (d) white
16. 16.🌈 Which hex code is magenta? (a) #ffffff (b) #00ffff (c) #ffff00 (d) #ff00ff
17. 17.🌈 In #160000 the red part is the hex number 16. What is it as a normal number?
18. 18.🌈 Which colour of light is strongest in rgb(11, 137, 172)? (a) red (b) green (c) blue
19. 19.🌈 Which hex code is bright green? (a) #00ffff (b) #ff00ff (c) #00ff00 (d) #0000ff
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
21. 21.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 100 (c) 99 (d) 255
22. 22.🌈 In #700000 the red part is the hex number 70. What is it as a normal number?
23. 23.🌈 Which colour is #ff0000? (a) blue (b) cyan (c) magenta (d) red
24. 24.🌈 Which colour is #000000? (a) magenta (b) black (c) white (d) bright green
25. 25.🌈 In #e70000 the red part is the hex number e7. What is it as a normal number?
26. 26.🌈 In #005c00 the green part is the hex number 5c. What is it as a normal number?
27. 27.🌈 In #2c0000 the red part is the hex number 2c. What is it as a normal number?
28. 28.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) cyan (c) red (d) white
29. 29.🌈 Which colour of light is strongest in rgb(84, 29, 152)? (a) green (b) blue (c) red
30. 30.🌈 Which colour of light is strongest in rgb(97, 154, 119)? (a) green (b) blue (c) red
31. 31.🌈 Which colour is #0000ff? (a) red (b) blue (c) magenta (d) yellow
32. 32.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) G (d) J
33. 33.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) magenta (c) yellow (d) black
34. 34.🌈 In #970000 the red part is the hex number 97. What is it as a normal number?
35. 35.🌈 In #400000 the red part is the hex number 40. What is it as a normal number?
36. 36.🌈 In #8b0000 the red part is the hex number 8b. What is it as a normal number?
37. 37.🌈 Which hex code is black? (a) #ffffff (b) #000000 (c) #ff00ff (d) #00ffff
38. 38.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 4 (d) 6
39. 39.🌈 In #ce0000 the red part is the hex number ce. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(40, 174, 106)? (a) blue (b) green (c) red

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