App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 277 · 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) white on dark green (b) black on yellow (c) dark blue on white (d) light grey on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
3. 3.True or false: icons with no meaning is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 28 px tall
   Start button: 52 px tall
   Done button: 48 px tall (a) Start (b) Save (c) Done
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Help button: 48 px tall
   Start button: 32 px tall
   Cancel button: 56 px tall (a) Save (b) Cancel (c) Start (d) Help
6. 6.True or false: a tiny 20 px button is poor button design. (a) False (b) True
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Cancel button: 56 px tall
   Save button: 52 px tall
   Start button: 24 px tall (a) Back (b) Save (c) Start (d) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Done button: 60 px tall
    Back button: 44 px tall
    Cancel button: 64 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 60 px tall
    Next button: 44 px tall
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
15. 15.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) yellow on white (d) black on pale grey
16. 16.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.True or false: buttons almost touching is good button design. (a) False (b) True
18. 18.True or false: space between buttons is poor button design. (a) True (b) False
19. 19.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) black on yellow
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 64 px tall
    Next button: 64 px tall
    Cancel button: 40 px tall
22. 22.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.True or false: space between buttons is good button design. (a) False (b) True
24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 44 px tall
    Start button: 36 px tall
    Cancel button: 36 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Next button: 44 px tall
    Back button: 36 px tall
    Done button: 48 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 60 px tall
    Next button: 52 px tall
    Send button: 56 px tall (a) Next (b) Save (c) Send (d) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Start button: 64 px tall
    Back button: 60 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Back button: 48 px tall
    Done button: 72 px tall (a) Back (b) Next (c) Done
30. 30.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) black on yellow (d) black on pale grey
31. 31.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) white on black (d) dark blue on white
32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.True or false: strong colour contrast is good button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Next button: 60 px tall
    Save button: 52 px tall
    Start button: 48 px tall (a) Start (b) Next (c) Save (d) Cancel
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 big, easy tap area is good button design. (a) True (b) False
40. 40.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) yellow on white (d) pale pink on white

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