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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 524 · 40 questions
TalentJR

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.

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

Answer key

  1. poor design
  2. good design
  3. 1
  4. good design
  5. 2
  6. black on pale grey
  7. yellow on white
  8. poor design
  9. 28
  10. Back
  11. easy to read
  12. Send
  13. easy to read
  14. hard to read
  15. Help
  16. good design
  17. False
  18. good design
  19. hard to read
  20. True
  21. pale pink on white
  22. Done
  23. 1
  24. Done
  25. dark blue on white
  26. True
  27. easy to read
  28. Next
  29. Cancel
  30. Start
  31. white on dark green
  32. 2
  33. poor design
  34. Back
  35. 16
  36. 20
  37. Save
  38. Start
  39. red on green
  40. hard to read

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