App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 115 · 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 yellow (b) dark blue on white (c) light grey on white (d) black on pale grey
2. 2.True or false: a tiny 20 px button is good button design. (a) True (b) False
3. 3.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) yellow on white
4. 4.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) dark blue on white (d) black on pale grey
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Next button: 36 px tall
   Done button: 72 px tall
   Cancel button: 60 px tall (a) Cancel (b) Next (c) Done (d) Save
6. 6.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) light grey on white (d) black on yellow
7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
8. 8.True or false: icons with no meaning is good button design. (a) False (b) True
9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
10. 10.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) dark blue on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 32 px tall
    Back button: 68 px tall (a) Send (b) Back (c) Cancel
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 60 px tall
    Send button: 60 px tall
13. 13.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
16. 16.True or false: strong colour contrast is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Back button: 60 px tall
    Start button: 60 px tall (a) Help (b) Start (c) Back
18. 18.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) yellow on white
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
20. 20.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Back button: 60 px tall
    Save button: 52 px tall
22. 22.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
24. 24.True or false: a big, easy tap area is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Save button: 56 px tall
    Back button: 68 px tall (a) Save (b) Back (c) Done
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 56 px tall
    Send button: 52 px tall (a) Done (b) Save (c) Send
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
32. 32.True or false: space between buttons is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 56 px tall
    Next button: 72 px tall (a) Help (b) Next (c) Back
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
37. 37.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Start button: 48 px tall
    Next button: 36 px tall
    Help button: 40 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 24 px tall
    Cancel button: 56 px tall
    Help button: 64 px tall (a) Cancel (b) Done (c) Back (d) Help
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Start button: 64 px tall
    Help button: 72 px tall (a) Next (b) Start (c) Help

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