CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 119 · 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(194, 6, 41)? (a) green (b) red (c) blue
2. 2.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) green (d) red
3. 3.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) white (c) blue (d) bright green
4. 4.🌈 In #0a0000 the red part is the hex number 0a. What is it as a normal number?
5. 5.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) J (d) G
6. 6.🌈 Which colour is #ffffff? (a) blue (b) yellow (c) white (d) magenta
7. 7.🌈 In #006900 the green part is the hex number 69. What is it as a normal number?
8. 8.🌈 Which colour is #00ffff? (a) bright green (b) yellow (c) red (d) cyan
9. 9.🌈 In #00005e the blue part is the hex number 5e. What is it as a normal number?
10. 10.🌈 In #000026 the blue part is the hex number 26. What is it as a normal number?
11. 11.🌈 Which colour is #ffff00? (a) red (b) bright green (c) yellow (d) black
12. 12.🌈 In #005d00 the green part is the hex number 5d. What is it as a normal number?
13. 13.🌈 Which colour of light is strongest in rgb(173, 133, 133)? (a) red (b) blue (c) green
14. 14.🌈 Which colour of light is strongest in rgb(173, 37, 118)? (a) red (b) blue (c) green
15. 15.🌈 Which colour of light is strongest in rgb(126, 202, 34)? (a) red (b) blue (c) green
16. 16.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) white (c) yellow (d) black
17. 17.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) magenta (c) red (d) bright green
18. 18.🌈 Which hex code is cyan? (a) #000000 (b) #ffffff (c) #00ffff (d) #ffff00
19. 19.🌈 Which hex code is bright green? (a) #ff0000 (b) #0000ff (c) #00ff00 (d) #00ffff
20. 20.🌈 Which hex code is black? (a) #0000ff (b) #00ff00 (c) #000000 (d) #ffff00
21. 21.🌈 Which colour of light is strongest in rgb(230, 50, 47)? (a) green (b) blue (c) red
22. 22.🌈 Which colour is #ff0000? (a) magenta (b) red (c) white (d) black
23. 23.🌈 Which hex code is white? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ffff00
24. 24.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 2 (d) 3
25. 25.🌈 Which colour is #0000ff? (a) yellow (b) blue (c) red (d) black
26. 26.🌈 In #004400 the green part is the hex number 44. What is it as a normal number?
27. 27.🌈 Which colour is rgb(0, 0, 255)? (a) red (b) white (c) yellow (d) blue
28. 28.🌈 Which hex code is blue? (a) #ff00ff (b) #ff0000 (c) #ffff00 (d) #0000ff
29. 29.🌈 In #000045 the blue part is the hex number 45. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(242, 64, 106)? (a) blue (b) green (c) red
31. 31.🌈 Which colour of light is strongest in rgb(176, 73, 140)? (a) red (b) blue (c) green
32. 32.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
33. 33.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 255 (d) 100
34. 34.🌈 Which colour of light is strongest in rgb(49, 85, 163)? (a) blue (b) red (c) green
35. 35.🌈 Which colour is #000000? (a) white (b) blue (c) cyan (d) black
36. 36.🌈 Which colour of light is strongest in rgb(39, 100, 163)? (a) red (b) blue (c) green
37. 37.🌈 Which colour is #00ff00? (a) red (b) yellow (c) bright green (d) cyan
38. 38.🌈 In #a90000 the red part is the hex number a9. What is it as a normal number?
39. 39.🌈 In #c20000 the red part is the hex number c2. What is it as a normal number?
40. 40.🌈 In #0000a6 the blue part is the hex number a6. What is it as a normal number?

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