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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 417 · 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: buttons almost touching? (a) poor design (b) good design
  2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 44 px tall
    Back button: 56 px tall
  4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Back button: 52 px tall
    Send button: 56 px tall
    Next button: 52 px tall     (a) Back (b) Send (c) Next (d) Start
  6. 6.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) black on pale grey (d) dark blue on white
  7. 7.True or false: a clear word like Save is poor button design. (a) True (b) False
  8. 8.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) dark blue on black (d) light grey on white
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Done button: 72 px tall
    Next button: 56 px tall
    Save button: 56 px tall     (a) Save (b) Done (c) Next (d) Send
  10. 10.🌗 Is dark blue 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?
    Send button: 64 px tall
    Done button: 72 px tall
    Start button: 60 px tall
    Save button: 40 px tall     (a) Save (b) Start (c) Send (d) Done
  12. 12.True or false: space between buttons is poor button design. (a) True (b) False
  13. 13.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
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Done button: 64 px tall
    Save button: 32 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Send button: 24 px tall
    Save button: 72 px tall
    Next button: 64 px tall     (a) Send (b) Next (c) Save (d) Done
  16. 16.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) light grey on white (d) yellow on white
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 52 px tall
    Cancel button: 24 px tall
    Back button: 60 px tall     (a) Cancel (b) Save (c) Back (d) Start
  23. 23.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Next button: 48 px tall
    Save button: 52 px tall     (a) Next (b) Save (c) Done
  28. 28.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on black (d) red on green
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Cancel button: 64 px tall
    Back button: 40 px tall
    Save button: 44 px tall
  30. 30.True or false: a clear word like Save is good button design. (a) True (b) False
  31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 64 px tall
    Help button: 36 px tall
  33. 33.True or false: space between buttons is good button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 68 px tall
    Send button: 36 px tall     (a) Cancel (b) Send (c) Done
  36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall     (a) Save (b) Help (c) Cancel
  39. 39.True or false: strong colour contrast is good button design. (a) False (b) True
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 48 px tall
    Save button: 60 px tall
    Next button: 44 px tall

Answer key

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

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