App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 419 · 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.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: a tiny 20 px button is good button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
4. 4.True or false: icons with no meaning is good button design. (a) True (b) False
5. 5.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on white (d) yellow on white
6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
8. 8.True or false: buttons almost touching is good button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 24 px tall
   Help button: 64 px tall
   Back button: 52 px tall
   Cancel button: 48 px tall (a) Help (b) Cancel (c) Send (d) Back
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: grey text on grey is good button design. (a) True (b) False
14. 14.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) red on green
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 24 px tall
    Save button: 72 px tall (a) Save (b) Back (c) Done
16. 16.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
18. 18.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) yellow on white (d) red on green
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
20. 20.True or false: space between buttons is poor button design. (a) True (b) False
21. 21.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 60 px tall
    Cancel button: 56 px tall
    Next button: 36 px tall (a) Save (b) Cancel (c) Next (d) Help
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) black on yellow
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Start button: 36 px tall
    Cancel button: 56 px tall
27. 27.True or false: strong colour contrast is good button design. (a) True (b) False
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a big, easy tap area is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 36 px tall
    Help button: 60 px tall (a) Back (b) Done (c) Help
32. 32.True or false: a tiny 20 px button is poor button design. (a) True (b) False
33. 33.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 56 px tall
    Save button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 56 px tall
    Cancel button: 40 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
37. 37.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) pale pink on white (d) light grey on white
38. 38.True or false: a clear word like Save is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Next button: 48 px tall
    Start button: 44 px tall
    Cancel button: 60 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 56 px tall
    Help button: 36 px tall (a) Back (b) Start (c) Help

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