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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 297 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Next button: 56 px tall
    Back button: 60 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  3. 3.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) dark blue on black (d) pale pink on white
  4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on dark green (d) black on yellow
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Save button: 52 px tall
    Back button: 56 px tall
  7. 7.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) dark blue on black
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) black on yellow
  13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  14. 14.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  16. 16.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on white (d) yellow on white
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 36 px tall
    Cancel button: 64 px tall
    Next button: 60 px tall     (a) Save (b) Back (c) Cancel (d) Next
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 32 px tall
    Help button: 60 px tall
    Done button: 72 px tall     (a) Back (b) Cancel (c) Done (d) Help
  21. 21.True or false: strong colour contrast is good button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 24 px tall
    Done button: 52 px tall     (a) Done (b) Cancel (c) Back
  23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 56 px tall
    Save button: 44 px tall
    Cancel button: 52 px tall
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.True or false: space between buttons is good button design. (a) False (b) True
  27. 27.True or false: strong colour contrast is poor button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Cancel button: 52 px tall
    Save button: 32 px tall
    Help button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  30. 30.True or false: a tiny 20 px button is good button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Cancel button: 60 px tall
    Send button: 56 px tall     (a) Send (b) Done (c) Cancel
  34. 34.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) red on green
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  36. 36.True or false: buttons almost touching is good button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 32 px tall
    Send button: 60 px tall
    Back button: 44 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Back button: 64 px tall
    Send button: 64 px tall     (a) Help (b) Send (c) Back
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Done button: 68 px tall
    Next button: 52 px tall
    Back button: 36 px tall     (a) Back (b) Next (c) Help (d) Done
  40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

Answer key

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

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