App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 272 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on dark green (d) dark blue on black
2. 2.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) red on green (d) pale pink on white
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Back button: 44 px tall
   Cancel button: 52 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 28 px tall
   Cancel button: 60 px tall
   Back button: 72 px tall
   Start button: 48 px tall (a) Cancel (b) Help (c) Start (d) Back
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Done button: 56 px tall
   Help button: 60 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Save button: 36 px tall
   Next button: 60 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 64 px tall
   Save button: 32 px tall
   Back button: 44 px tall
9. 9.True or false: a tiny 20 px button is poor button design. (a) False (b) True
10. 10.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on pale grey (d) dark blue on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 56 px tall
    Start button: 52 px tall
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
13. 13.True or false: buttons almost touching is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 56 px tall
    Start button: 32 px tall
    Next button: 56 px tall
15. 15.True or false: strong colour contrast is good button design. (a) True (b) False
16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on white (d) dark blue on black
19. 19.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
21. 21.True or false: icons with no meaning is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
24. 24.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on pale grey (d) red on green
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Start button: 64 px tall
    Help button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Send button: 52 px tall
    Start button: 72 px tall (a) Help (b) Start (c) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Done button: 56 px tall
    Next button: 44 px tall
28. 28.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: a clear word like Save is good button design. (a) True (b) False
31. 31.True or false: a clear word like Save is poor button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
33. 33.True or false: strong colour contrast is poor button design. (a) True (b) False
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
36. 36.True or false: a tiny 20 px button is good button design. (a) True (b) False
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
38. 38.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
40. 40.True or false: a big, easy tap area is good button design. (a) True (b) False

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