CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 223 · 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 #001e00 the green part is the hex number 1e. What is it as a normal number?
2. 2.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green
3. 3.🌈 Which colour is #000000? (a) cyan (b) black (c) blue (d) magenta
4. 4.🌈 Which colour of light is strongest in rgb(67, 137, 153)? (a) blue (b) red (c) green
5. 5.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 99 (d) 255
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 4 (c) 3 (d) 2
7. 7.🌈 In #001500 the green part is the hex number 15. What is it as a normal number?
8. 8.🌈 In #cd0000 the red part is the hex number cd. What is it as a normal number?
9. 9.🌈 Which colour is #ffff00? (a) yellow (b) red (c) bright green (d) black
10. 10.🌈 Which colour of light is strongest in rgb(115, 57, 236)? (a) red (b) green (c) blue
11. 11.🌈 In #b10000 the red part is the hex number b1. What is it as a normal number?
12. 12.🌈 Which colour is #0000ff? (a) cyan (b) red (c) white (d) blue
13. 13.🌈 Which colour is #ffffff? (a) yellow (b) cyan (c) white (d) bright green
14. 14.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) red (c) magenta (d) bright green
15. 15.🌈 In #0b0000 the red part is the hex number 0b. What is it as a normal number?
16. 16.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) cyan (c) blue (d) red
17. 17.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) yellow (c) cyan (d) magenta
18. 18.🌈 Which colour of light is strongest in rgb(108, 96, 245)? (a) blue (b) green (c) red
19. 19.🌈 Which hex code is cyan? (a) #00ff00 (b) #000000 (c) #00ffff (d) #0000ff
20. 20.🌈 Which colour of light is strongest in rgb(135, 173, 32)? (a) green (b) red (c) blue
21. 21.🌈 Which colour of light is strongest in rgb(241, 116, 130)? (a) green (b) red (c) blue
22. 22.🌈 Which hex code is red? (a) #ffffff (b) #000000 (c) #00ffff (d) #ff0000
23. 23.🌈 Which colour of light is strongest in rgb(19, 51, 167)? (a) green (b) blue (c) red
24. 24.🌈 In #00b000 the green part is the hex number b0. What is it as a normal number?
25. 25.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) white (c) cyan (d) blue
26. 26.🌈 In #000009 the blue part is the hex number 09. What is it as a normal number?
27. 27.🌈 Which hex code is black? (a) #000000 (b) #00ffff (c) #0000ff (d) #ff0000
28. 28.🌈 Which colour of light is strongest in rgb(66, 136, 221)? (a) red (b) blue (c) green
29. 29.🌈 In #ee0000 the red part is the hex number ee. What is it as a normal number?
30. 30.🌈 In #007900 the green part is the hex number 79. What is it as a normal number?
31. 31.🌈 In #110000 the red part is the hex number 11. What is it as a normal number?
32. 32.🌈 Which hex code is bright green? (a) #00ff00 (b) #ffff00 (c) #000000 (d) #00ffff
33. 33.🌈 In #001000 the green part is the hex number 10. What is it as a normal number?
34. 34.🌈 In #006000 the green part is the hex number 60. What is it as a normal number?
35. 35.🌈 In #0000f5 the blue part is the hex number f5. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(66, 2, 159)? (a) green (b) red (c) blue
37. 37.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) green (d) red
38. 38.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) black (c) white (d) cyan
39. 39.🌈 Which colour of light is strongest in rgb(154, 121, 59)? (a) red (b) blue (c) green
40. 40.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) yellow (c) white (d) black

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