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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 588 · 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) light grey on white (b) black on yellow (c) dark blue on white (d) white on black
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 32 px tall
    Done button: 36 px tall
  3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  4. 4.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) white on dark green (d) pale pink on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 64 px tall
    Save button: 36 px tall
    Cancel button: 36 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 28 px tall
    Start button: 48 px tall     (a) Save (b) Back (c) Start
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Help button: 56 px tall
    Cancel button: 36 px tall     (a) Send (b) Cancel (c) Help
  8. 8.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) red on green (d) light grey on white
  9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Cancel button: 56 px tall
    Start button: 32 px tall
    Save button: 48 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 36 px tall
    Start button: 72 px tall     (a) Done (b) Start (c) Back
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 48 px tall
    Start button: 64 px tall
    Cancel button: 32 px tall
  14. 14.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.True or false: a clear word like Save is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
  19. 19.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 60 px tall
    Help button: 32 px tall
    Cancel button: 48 px tall     (a) Send (b) Help (c) Cancel (d) Save
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 40 px tall
    Next button: 48 px tall
    Done button: 60 px tall     (a) Next (b) Done (c) Cancel (d) Send
  23. 23.True or false: icons with no meaning is good button design. (a) False (b) True
  24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.Which colour pair is hard to read? (a) white on black (b) red on green (c) dark blue on white (d) white on dark green
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Back button: 36 px tall
    Send button: 40 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Next button: 56 px tall
    Start button: 56 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Help button: 68 px tall
    Send button: 68 px tall
    Next button: 64 px tall     (a) Help (b) Send (c) Done (d) Next
  31. 31.True or false: a big, easy tap area is good button design. (a) False (b) True
  32. 32.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  33. 33.True or false: strong colour contrast is poor button design. (a) False (b) True
  34. 34.True or false: a clear word like Save is poor button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 36 px tall
    Next button: 36 px tall
  36. 36.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Send button: 48 px tall
    Back button: 36 px tall
  38. 38.True or false: strong colour contrast is good button design. (a) True (b) False
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 40 px tall
    Start button: 36 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 36 px tall
    Cancel button: 48 px tall     (a) Send (b) Cancel (c) Done

Answer key

  1. light grey on white
  2. 0
  3. good design
  4. pale pink on white
  5. 1
  6. Save
  7. Cancel
  8. white on black
  9. easy to read
  10. good design
  11. 3
  12. Done
  13. 3
  14. hard to read
  15. True
  16. 16
  17. hard to read
  18. False
  19. good design
  20. 12
  21. Help
  22. Send
  23. False
  24. hard to read
  25. red on green
  26. 0
  27. 16
  28. good design
  29. 3
  30. Done
  31. True
  32. poor design
  33. False
  34. False
  35. 0
  36. hard to read
  37. 1
  38. True
  39. 0
  40. Send

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