App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 584 · 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) black on pale grey (c) white on dark green (d) yellow on white
2. 2.True or false: a clear word like Save is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 56 px tall
   Send button: 56 px tall
   Next button: 36 px tall (a) Next (b) Send (c) Back
4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
7. 7.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 36 px tall
   Start button: 52 px tall
   Help button: 52 px tall (a) Done (b) Start (c) Help
10. 10.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 64 px tall
    Back button: 36 px tall
    Next button: 52 px tall (a) Cancel (b) Next (c) Back (d) Save
12. 12.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on black (d) red on green
13. 13.True or false: icons with no meaning is poor button design. (a) True (b) False
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 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
    Cancel button: 44 px tall
17. 17.Which colour pair is easy to read? (a) red on green (b) white on black (c) dark blue on black (d) pale pink on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Done button: 44 px tall
    Cancel button: 64 px tall (a) Save (b) Cancel (c) Done
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 56 px tall
    Done button: 56 px tall (a) Done (b) Help (c) Save
20. 20.True or false: a tiny 20 px button is good button design. (a) False (b) True
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
23. 23.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) light grey on white (d) white on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 36 px tall
    Next button: 60 px tall (a) Save (b) Next (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 48 px tall
    Next button: 40 px tall
26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 56 px tall
    Next button: 52 px tall (a) Start (b) Next (c) Save
29. 29.True or false: a big, easy tap area is good button design. (a) False (b) True
30. 30.True or false: grey text on grey is good button design. (a) True (b) False
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Cancel button: 56 px tall
    Back button: 28 px tall
    Send button: 72 px tall (a) Done (b) Send (c) Back (d) Cancel
33. 33.True or false: buttons almost touching is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
35. 35.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) yellow on white
37. 37.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) black on yellow
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Done button: 56 px tall
    Help button: 36 px tall (a) Start (b) Help (c) Done
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Save button: 68 px tall
    Next button: 56 px tall (a) Back (b) Save (c) Next

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