CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 179 · 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.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
2. 2.🌈 Which colour is #ffff00? (a) black (b) bright green (c) blue (d) yellow
3. 3.🌈 Which colour is #ff00ff? (a) blue (b) yellow (c) magenta (d) black
4. 4.🌈 Which colour of light is strongest in rgb(209, 115, 86)? (a) blue (b) green (c) red
5. 5.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) cyan (c) yellow (d) red
6. 6.🌈 Which colour is #00ffff? (a) red (b) magenta (c) yellow (d) cyan
7. 7.🌈 Which colour of light is strongest in rgb(12, 139, 224)? (a) blue (b) green (c) red
8. 8.🌈 Which colour of light is strongest in rgb(84, 156, 6)? (a) red (b) blue (c) green
9. 9.🌈 Which colour is rgb(255, 0, 255)? (a) bright green (b) yellow (c) white (d) magenta
10. 10.🌈 Which hex code is red? (a) #00ffff (b) #ff0000 (c) #0000ff (d) #000000
11. 11.🌈 Which colour of light is strongest in rgb(71, 100, 188)? (a) blue (b) red (c) green
12. 12.🌈 Which colour is #ff0000? (a) yellow (b) bright green (c) blue (d) red
13. 13.🌈 Which hex code is magenta? (a) #00ffff (b) #ff00ff (c) #00ff00 (d) #000000
14. 14.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 2 (d) 4
15. 15.🌈 Which colour is rgb(0, 0, 0)? (a) blue (b) bright green (c) cyan (d) black
16. 16.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) red (c) blue (d) magenta
17. 17.🌈 Which colour is #ffffff? (a) yellow (b) white (c) black (d) bright green
18. 18.🌈 In #005200 the green part is the hex number 52. What is it as a normal number?
19. 19.🌈 Which colour of light is strongest in rgb(23, 181, 136)? (a) green (b) blue (c) red
20. 20.🌈 In #002600 the green part is the hex number 26. What is it as a normal number?
21. 21.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) bright green (c) blue (d) white
22. 22.🌈 In #00003f the blue part is the hex number 3f. What is it as a normal number?
23. 23.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) black (d) red
24. 24.🌈 Which colour is #00ff00? (a) white (b) black (c) yellow (d) bright green
25. 25.🌈 Which colour is rgb(255, 255, 255)? (a) magenta (b) cyan (c) blue (d) white
26. 26.🌈 Which colour of light is strongest in rgb(180, 52, 16)? (a) green (b) blue (c) red
27. 27.🌈 In #0000b3 the blue part is the hex number b3. What is it as a normal number?
28. 28.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 1000 (d) 255
29. 29.🌈 Which hex code is white? (a) #ffffff (b) #ff0000 (c) #ff00ff (d) #ffff00
30. 30.🌈 Which colour is #0000ff? (a) black (b) white (c) blue (d) red
31. 31.🌈 In #d90000 the red part is the hex number d9. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(24, 151, 59)? (a) red (b) blue (c) green
33. 33.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) red (c) bright green (d) cyan
34. 34.🌈 In #007600 the green part is the hex number 76. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(26, 235, 97)? (a) blue (b) red (c) green
36. 36.🌈 In #00000d the blue part is the hex number 0d. What is it as a normal number?
37. 37.🌈 Which colour of light is strongest in rgb(4, 223, 62)? (a) green (b) blue (c) red
38. 38.🌈 Which colour is #000000? (a) yellow (b) black (c) white (d) bright green
39. 39.🌈 In #d60000 the red part is the hex number d6. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(16, 7, 187)? (a) red (b) green (c) blue

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