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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 597 · 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 easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) white on dark green
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  4. 4.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Next button: 48 px tall
    Help button: 68 px tall
    Send button: 60 px tall     (a) Help (b) Next (c) Save (d) Send
  6. 6.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) light grey on white (d) pale pink on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Save button: 44 px tall
    Done button: 56 px tall
    Start button: 36 px tall
  8. 8.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Save button: 48 px tall
    Done button: 48 px tall
  10. 10.True or false: a big, easy tap area is poor button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Save button: 36 px tall
    Done button: 56 px tall
    Start button: 52 px tall     (a) Start (b) Done (c) Back (d) Save
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Save button: 64 px tall
    Back button: 64 px tall     (a) Cancel (b) Save (c) Back
  18. 18.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) pale pink on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Cancel button: 32 px tall
    Send button: 56 px tall
    Help button: 32 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Next button: 64 px tall
    Send button: 48 px tall
    Help button: 48 px tall     (a) Help (b) Next (c) Start (d) Send
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 52 px tall
    Next button: 56 px tall
    Back button: 48 px tall
  24. 24.True or false: strong colour contrast is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 52 px tall
    Cancel button: 36 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Send button: 32 px tall
    Cancel button: 48 px tall     (a) Help (b) Cancel (c) Send
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Next button: 64 px tall
    Save button: 52 px tall
    Cancel button: 40 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Help button: 68 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall     (a) Back (b) Cancel (c) Next (d) Help
  29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 56 px tall
    Start button: 24 px tall
    Help button: 48 px tall     (a) Start (b) Help (c) Send (d) Next
  34. 34.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) white on black
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 64 px tall
    Cancel button: 52 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  37. 37.True or false: space between buttons is poor button design. (a) False (b) True
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 56 px tall
    Next button: 52 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Cancel button: 48 px tall
    Next button: 56 px tall
    Save button: 64 px tall     (a) Cancel (b) Back (c) Next (d) Save
  40. 40.True or false: a clear word like Save is poor button design. (a) False (b) True

Answer key

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

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