CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 124 · 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 hex code is magenta? (a) #ffffff (b) #000000 (c) #ff00ff (d) #00ff00
2. 2.🌈 In #000003 the blue part is the hex number 03. What is it as a normal number?
3. 3.🌈 Which colour is #ff0000? (a) magenta (b) cyan (c) red (d) blue
4. 4.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) J (d) Z
5. 5.🌈 Which colour of light is strongest in rgb(197, 86, 15)? (a) red (b) blue (c) green
6. 6.🌈 In #00ca00 the green part is the hex number ca. What is it as a normal number?
7. 7.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) bright green (c) cyan (d) red
8. 8.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
9. 9.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 1000 (d) 99
10. 10.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) green (d) red
11. 11.🌈 Which colour is rgb(255, 0, 0)? (a) white (b) bright green (c) red (d) black
12. 12.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) white (c) bright green (d) yellow
13. 13.🌈 Which colour of light is strongest in rgb(3, 4, 212)? (a) blue (b) red (c) green
14. 14.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) magenta (c) red (d) bright green
15. 15.🌈 Which colour is #ffffff? (a) bright green (b) white (c) black (d) blue
16. 16.🌈 Which colour of light is strongest in rgb(131, 253, 46)? (a) green (b) blue (c) red
17. 17.🌈 Which colour is #0000ff? (a) black (b) yellow (c) blue (d) cyan
18. 18.🌈 Which hex code is bright green? (a) #ffffff (b) #0000ff (c) #00ff00 (d) #000000
19. 19.🌈 Which hex code is black? (a) #00ffff (b) #ffff00 (c) #000000 (d) #0000ff
20. 20.🌈 Which hex code is white? (a) #ffffff (b) #ff0000 (c) #ffff00 (d) #00ffff
21. 21.🌈 Which colour is #000000? (a) red (b) cyan (c) blue (d) black
22. 22.🌈 Which colour of light is strongest in rgb(47, 71, 223)? (a) green (b) blue (c) red
23. 23.🌈 Which hex code is red? (a) #ffff00 (b) #ffffff (c) #00ffff (d) #ff0000
24. 24.🌈 In #00f200 the green part is the hex number f2. What is it as a normal number?
25. 25.🌈 Which hex code is cyan? (a) #00ffff (b) #ff0000 (c) #00ff00 (d) #ffff00
26. 26.🌈 Which colour is #ff00ff? (a) magenta (b) blue (c) black (d) red
27. 27.🌈 Which colour of light is strongest in rgb(49, 43, 235)? (a) green (b) blue (c) red
28. 28.🌈 In #420000 the red part is the hex number 42. What is it as a normal number?
29. 29.🌈 In #00b700 the green part is the hex number b7. What is it as a normal number?
30. 30.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #ffff00 (d) #00ff00
31. 31.🌈 Which colour is #00ffff? (a) black (b) cyan (c) blue (d) magenta
32. 32.🌈 Which colour of light is strongest in rgb(90, 21, 172)? (a) red (b) blue (c) green
33. 33.🌈 Which colour is #ffff00? (a) yellow (b) blue (c) white (d) bright green
34. 34.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) blue (c) green (d) red
35. 35.🌈 In #000080 the blue part is the hex number 80. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(39, 20, 152)? (a) blue (b) red (c) green
37. 37.🌈 Which colour of light is strongest in rgb(15, 68, 222)? (a) blue (b) red (c) green
38. 38.🌈 In #00007f the blue part is the hex number 7f. What is it as a normal number?
39. 39.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) black (c) yellow (d) bright green
40. 40.🌈 Which colour of light is strongest in rgb(207, 58, 46)? (a) red (b) green (c) blue

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