App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 117 · 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) dark blue on black (b) yellow on white (c) red on green (d) black on pale grey
2. 2.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) white on black
3. 3.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) dark blue on white (d) white on black
4. 4.True or false: a tiny 20 px button is good button design. (a) False (b) True
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: space between buttons is poor button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 44 px tall
   Start button: 52 px tall
   Done button: 40 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 48 px tall
    Help button: 40 px tall (a) Save (b) Next (c) Help
12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
13. 13.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 52 px tall
    Save button: 24 px tall (a) Start (b) Cancel (c) Save
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Next button: 52 px tall
    Save button: 52 px tall (a) Next (b) Save (c) Cancel
23. 23.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good 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.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 64 px tall
    Start button: 32 px tall
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) white on dark green (d) black on pale grey
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Help button: 52 px tall
    Next button: 60 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 56 px tall
    Cancel button: 64 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Cancel button: 52 px tall
    Done button: 64 px tall (a) Cancel (b) Done (c) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 52 px tall
    Start button: 32 px tall
    Send button: 36 px tall
35. 35.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) yellow on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 60 px tall
    Help button: 32 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 52 px tall
    Save button: 52 px tall
    Next button: 64 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Cancel button: 44 px tall
    Start button: 68 px tall
    Save button: 64 px tall (a) Start (b) Send (c) Save (d) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 60 px tall
    Save button: 40 px tall
    Cancel button: 56 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Next button: 32 px tall
    Start button: 32 px tall
    Save button: 32 px tall

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