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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 121 · 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.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) dark blue on white
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 48 px tall
    Send button: 60 px tall
    Save button: 44 px tall     (a) Help (b) Save (c) Send (d) Cancel
  3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  5. 5.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Save button: 32 px tall
    Back button: 64 px tall
    Help button: 48 px tall
  7. 7.True or false: a clear word like Save is good button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 52 px tall
    Help button: 48 px tall
    Done button: 60 px tall
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) light grey on white
  11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.True or false: a tiny 20 px button is good button design. (a) False (b) True
  13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.True or false: icons with no meaning is good button design. (a) True (b) False
  16. 16.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) black on yellow (d) white on black
  17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  19. 19.🌗 Is white on dark 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.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 72 px tall
    Help button: 72 px tall
    Send button: 36 px tall     (a) Cancel (b) Help (c) Next (d) Send
  23. 23.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  24. 24.True or false: grey text on grey is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  27. 27.True or false: icons with no meaning is poor button design. (a) False (b) True
  28. 28.True or false: buttons almost touching is poor button design. (a) True (b) False
  29. 29.True or false: space between buttons is good button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 72 px tall
    Done button: 64 px tall
    Back button: 40 px tall     (a) Back (b) Done (c) Save (d) Next
  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?
    Save button: 24 px tall
    Cancel button: 68 px tall
    Done button: 52 px tall     (a) Save (b) Done (c) Cancel
  34. 34.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) white on black
  35. 35.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  36. 36.True or false: buttons almost touching is good button design. (a) True (b) False
  37. 37.True or false: grey text on grey is good button design. (a) False (b) True
  38. 38.True or false: a clear word like Save is poor button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Done button: 44 px tall
    Back button: 56 px tall     (a) Back (b) Help (c) Done
  40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design

Answer key

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

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