App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 480 · 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 this good or poor button design: grey text on grey? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 36 px tall
   Start button: 56 px tall
   Cancel button: 48 px tall (a) Next (b) Cancel (c) Start
5. 5.True or false: strong colour contrast is good button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) light grey on white
7. 7.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) pale pink on white (d) white on black
8. 8.True or false: icons with no meaning is poor button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) white on black
11. 11.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) yellow on white (d) light grey on white
13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.True or false: grey text on grey is poor button design. (a) True (b) False
16. 16.True or false: buttons almost touching is poor button design. (a) False (b) True
17. 17.True or false: space between buttons is good button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Start button: 48 px tall
    Cancel button: 60 px tall (a) Send (b) Cancel (c) Start
19. 19.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) dark blue on white (d) black on pale grey
20. 20.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 36 px tall
    Cancel button: 52 px tall
    Done button: 52 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
25. 25.🌗 Is black on yellow 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. The Start button is 28 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 28 px tall
    Cancel button: 68 px tall
    Start button: 52 px tall (a) Start (b) Cancel (c) Back (d) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Cancel button: 40 px tall
    Done button: 68 px tall (a) Done (b) Back (c) Cancel
29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Next button: 28 px tall
    Send button: 64 px tall
    Cancel button: 48 px tall (a) Back (b) Send (c) Next (d) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
33. 33.True or false: icons with no meaning is good button design. (a) True (b) False
34. 34.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 48 px tall
    Send button: 48 px tall
36. 36.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) red on green
37. 37.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on pale grey (d) pale pink on white
38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.True or false: a tiny 20 px button is poor button design. (a) True (b) False
40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

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