CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 237 · 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(40, 38, 227)? (a) green (b) blue (c) red
2. 2.🌈 Which colour is #000000? (a) magenta (b) white (c) bright green (d) black
3. 3.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) yellow (c) black (d) bright green
4. 4.🌈 Which colour of light is strongest in rgb(156, 88, 8)? (a) green (b) red (c) blue
5. 5.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 3 (d) 6
6. 6.🌈 Which hex code is blue? (a) #ff00ff (b) #000000 (c) #00ffff (d) #0000ff
7. 7.🌈 Which colour is #00ff00? (a) white (b) black (c) red (d) bright green
8. 8.🌈 In #004600 the green part is the hex number 46. What is it as a normal number?
9. 9.🌈 Which colour is #ff00ff? (a) white (b) black (c) magenta (d) blue
10. 10.🌈 Which hex code is bright green? (a) #ff0000 (b) #00ff00 (c) #ffff00 (d) #00ffff
11. 11.🌈 Which hex code is yellow? (a) #ff00ff (b) #ffff00 (c) #ffffff (d) #00ff00
12. 12.🌈 Which colour is #00ffff? (a) yellow (b) cyan (c) red (d) blue
13. 13.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) blue (c) red (d) green
14. 14.🌈 Which hex code is red? (a) #00ffff (b) #ff0000 (c) #000000 (d) #ffff00
15. 15.🌈 Which colour is #ffff00? (a) red (b) bright green (c) magenta (d) yellow
16. 16.🌈 Which colour is #0000ff? (a) magenta (b) blue (c) black (d) bright green
17. 17.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) Z (c) G (d) F
18. 18.🌈 Which hex code is black? (a) #00ff00 (b) #ffffff (c) #ffff00 (d) #000000
19. 19.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) bright green (c) red (d) blue
20. 20.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 100 (d) 1000
21. 21.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) black (d) green
22. 22.🌈 Which hex code is cyan? (a) #ff00ff (b) #ffffff (c) #0000ff (d) #00ffff
23. 23.🌈 Which hex code is white? (a) #ffffff (b) #ff00ff (c) #00ffff (d) #ff0000
24. 24.🌈 Which colour of light is strongest in rgb(56, 46, 214)? (a) green (b) red (c) blue
25. 25.🌈 In #002900 the green part is the hex number 29. What is it as a normal number?
26. 26.🌈 Which colour is #ff0000? (a) yellow (b) red (c) cyan (d) white
27. 27.🌈 Which colour is #ffffff? (a) black (b) cyan (c) white (d) red
28. 28.🌈 Which colour of light is strongest in rgb(73, 99, 159)? (a) green (b) blue (c) red
29. 29.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) red (c) white (d) bright green
30. 30.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) cyan (c) red (d) magenta
31. 31.🌈 Which colour of light is strongest in rgb(97, 222, 133)? (a) red (b) green (c) blue
32. 32.🌈 In #0000bb the blue part is the hex number bb. What is it as a normal number?
33. 33.🌈 Which colour is rgb(0, 255, 255)? (a) bright green (b) yellow (c) black (d) cyan
34. 34.🌈 In #00004f the blue part is the hex number 4f. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(107, 208, 132)? (a) blue (b) red (c) green
36. 36.🌈 Which colour of light is strongest in rgb(240, 140, 118)? (a) blue (b) green (c) red
37. 37.🌈 Which colour of light is strongest in rgb(71, 101, 191)? (a) red (b) blue (c) green
38. 38.🌈 Which colour of light is strongest in rgb(158, 36, 55)? (a) green (b) red (c) blue
39. 39.🌈 Which colour of light is strongest in rgb(3, 122, 160)? (a) red (b) green (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(154, 9, 124)? (a) green (b) red (c) blue

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