App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 433 · 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 hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) yellow on white
2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Cancel button: 48 px tall
   Done button: 60 px tall
   Send button: 32 px tall (a) Cancel (b) Done (c) Send (d) Save
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 56 px tall
   Back button: 36 px tall
   Cancel button: 44 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 52 px tall
   Cancel button: 32 px tall
   Send button: 44 px tall
7. 7.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.True or false: strong colour contrast is poor button design. (a) False (b) True
10. 10.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on dark green (d) white on black
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
13. 13.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) dark blue on black (d) pale pink on white
14. 14.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) black on pale grey
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 56 px tall
    Done button: 28 px tall (a) Done (b) Next (c) Send
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Start button: 28 px tall
    Save button: 64 px tall
    Done button: 64 px tall (a) Save (b) Next (c) Done (d) Start
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.True or false: buttons almost touching is poor button design. (a) True (b) False
25. 25.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Cancel button: 64 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Help
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
29. 29.True or false: buttons almost touching is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Save button: 52 px tall
    Done button: 28 px tall
    Cancel button: 56 px tall (a) Save (b) Help (c) Cancel (d) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 36 px tall
    Save button: 60 px tall
    Send button: 40 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 36 px tall
    Cancel button: 44 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
34. 34.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.True or false: a big, easy tap area is poor button design. (a) True (b) False
36. 36.True or false: strong colour contrast is good button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Start button: 44 px tall
    Cancel button: 44 px tall
    Done button: 36 px tall
38. 38.True or false: space between buttons is poor button design. (a) True (b) False
39. 39.True or false: a tiny 20 px button is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Help button: 28 px tall
    Next button: 60 px tall (a) Next (b) Help (c) Start

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