CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 117 · 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 is #0000ff? (a) white (b) yellow (c) blue (d) red
2. 2.🌈 Which hex code is red? (a) #ffffff (b) #000000 (c) #ff0000 (d) #00ff00
3. 3.🌈 Which colour is #00ff00? (a) blue (b) cyan (c) bright green (d) magenta
4. 4.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) F (d) J
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 4 (d) 3
7. 7.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
8. 8.🌈 Which hex code is magenta? (a) #ffffff (b) #ff00ff (c) #00ff00 (d) #0000ff
9. 9.🌈 Which colour is #000000? (a) magenta (b) bright green (c) red (d) black
10. 10.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) black (c) red (d) magenta
11. 11.🌈 Which hex code is blue? (a) #ff00ff (b) #00ffff (c) #0000ff (d) #00ff00
12. 12.🌈 Which colour is #ff0000? (a) red (b) bright green (c) blue (d) black
13. 13.🌈 In #007300 the green part is the hex number 73. What is it as a normal number?
14. 14.🌈 Which colour of light is strongest in rgb(106, 165, 74)? (a) blue (b) green (c) red
15. 15.🌈 Which colour of light is strongest in rgb(209, 87, 9)? (a) red (b) green (c) blue
16. 16.🌈 In #00001b the blue part is the hex number 1b. What is it as a normal number?
17. 17.🌈 In #d90000 the red part is the hex number d9. What is it as a normal number?
18. 18.🌈 Which colour of light is strongest in rgb(80, 152, 32)? (a) green (b) blue (c) red
19. 19.🌈 Which colour is #ffff00? (a) magenta (b) blue (c) white (d) yellow
20. 20.🌈 Which hex code is yellow? (a) #00ffff (b) #ffff00 (c) #ff0000 (d) #00ff00
21. 21.🌈 Which colour is #00ffff? (a) blue (b) magenta (c) cyan (d) bright green
22. 22.🌈 Which hex code is white? (a) #ff00ff (b) #ffffff (c) #00ff00 (d) #ffff00
23. 23.🌈 Which colour of light is strongest in rgb(52, 161, 6)? (a) blue (b) red (c) green
24. 24.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) bright green (c) black (d) red
25. 25.🌈 Which colour of light is strongest in rgb(254, 97, 79)? (a) blue (b) red (c) green
26. 26.🌈 Which colour of light is strongest in rgb(68, 93, 224)? (a) blue (b) red (c) green
27. 27.🌈 Which colour is #ff00ff? (a) blue (b) white (c) cyan (d) magenta
28. 28.🌈 Which colour of light is strongest in rgb(37, 182, 2)? (a) red (b) blue (c) green
29. 29.🌈 Which colour of light is strongest in rgb(135, 20, 195)? (a) red (b) blue (c) green
30. 30.🌈 Which colour of light is strongest in rgb(164, 3, 115)? (a) red (b) green (c) blue
31. 31.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 255 (c) 99 (d) 100
32. 32.🌈 Which colour is rgb(255, 0, 0)? (a) white (b) red (c) black (d) cyan
33. 33.🌈 In #000083 the blue part is the hex number 83. What is it as a normal number?
34. 34.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) red (c) blue (d) yellow
35. 35.🌈 Which colour of light is strongest in rgb(222, 116, 29)? (a) green (b) red (c) blue
36. 36.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) magenta (c) yellow (d) black
37. 37.🌈 Which colour of light is strongest in rgb(26, 46, 228)? (a) blue (b) green (c) red
38. 38.🌈 Which colour of light is strongest in rgb(233, 59, 98)? (a) green (b) red (c) blue
39. 39.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) black (c) blue (d) red
40. 40.🌈 In #a90000 the red part is the hex number a9. What is it as a normal number?

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