CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 281 · 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 #000056 the blue part is the hex number 56. What is it as a normal number?
2. 2.🌈 Which hex code is cyan? (a) #000000 (b) #ff0000 (c) #ffff00 (d) #00ffff
3. 3.🌈 Which hex code is yellow? (a) #ffff00 (b) #ff0000 (c) #0000ff (d) #00ffff
4. 4.🌈 In #00f400 the green part is the hex number f4. What is it as a normal number?
5. 5.🌈 Which colour is #00ff00? (a) red (b) blue (c) bright green (d) magenta
6. 6.🌈 In #af0000 the red part is the hex number af. What is it as a normal number?
7. 7.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 1000 (d) 99
8. 8.🌈 Which colour is #ffffff? (a) blue (b) red (c) white (d) cyan
9. 9.🌈 Which colour of light is strongest in rgb(177, 8, 44)? (a) blue (b) green (c) red
10. 10.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) bright green (c) red (d) black
11. 11.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) cyan (c) red (d) black
12. 12.🌈 Which colour of light is strongest in rgb(172, 112, 130)? (a) red (b) green (c) blue
13. 13.🌈 Which colour of light is strongest in rgb(197, 65, 45)? (a) green (b) blue (c) red
14. 14.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) yellow (c) blue (d) black
15. 15.🌈 Which colour of light is strongest in rgb(51, 31, 217)? (a) red (b) green (c) blue
16. 16.🌈 Which colour of light is strongest in rgb(178, 54, 37)? (a) red (b) blue (c) green
17. 17.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
18. 18.🌈 Which hex code is blue? (a) #ff00ff (b) #ffff00 (c) #0000ff (d) #ff0000
19. 19.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) black (d) blue
20. 20.🌈 Which colour is #000000? (a) white (b) yellow (c) red (d) black
21. 21.🌈 Which colour is #ffff00? (a) white (b) red (c) yellow (d) bright green
22. 22.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) black (c) red (d) yellow
23. 23.🌈 Which colour of light is strongest in rgb(251, 18, 93)? (a) green (b) red (c) blue
24. 24.🌈 Which colour of light is strongest in rgb(45, 130, 157)? (a) green (b) red (c) blue
25. 25.🌈 In #000023 the blue part is the hex number 23. What is it as a normal number?
26. 26.🌈 In #0000e4 the blue part is the hex number e4. What is it as a normal number?
27. 27.🌈 In #00007b the blue part is the hex number 7b. What is it as a normal number?
28. 28.🌈 Which colour of light is strongest in rgb(60, 74, 163)? (a) blue (b) red (c) green
29. 29.🌈 In #4a0000 the red part is the hex number 4a. What is it as a normal number?
30. 30.🌈 Which colour is #00ffff? (a) magenta (b) bright green (c) red (d) cyan
31. 31.🌈 Which colour of light is strongest in rgb(166, 13, 74)? (a) green (b) blue (c) red
32. 32.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 3 (d) 6
33. 33.🌈 Which colour of light is strongest in rgb(103, 25, 185)? (a) red (b) blue (c) green
34. 34.🌈 Which hex code is bright green? (a) #00ffff (b) #0000ff (c) #00ff00 (d) #ffffff
35. 35.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) cyan (c) yellow (d) black
36. 36.🌈 In #006600 the green part is the hex number 66. What is it as a normal number?
37. 37.🌈 Which colour is #0000ff? (a) red (b) blue (c) bright green (d) cyan
38. 38.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) magenta (c) black (d) white
39. 39.🌈 Which colour of light is strongest in rgb(74, 186, 96)? (a) green (b) red (c) blue
40. 40.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z

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