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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 430 · 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) white on black (b) black on pale grey (c) dark blue on white (d) dark blue on black
  2. 2.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on black (d) red on green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Next button: 60 px tall
    Cancel button: 40 px tall
    Done button: 32 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 40 px tall
    Done button: 48 px tall
    Send button: 36 px tall
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 44 px tall
    Save button: 48 px tall     (a) Save (b) Start (c) Cancel
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 52 px tall
    Save button: 36 px tall
    Cancel button: 32 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 72 px tall
    Cancel button: 36 px tall
    Done button: 60 px tall     (a) Start (b) Cancel (c) Send (d) Done
  13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
  14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) pale pink on white
  16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  17. 17.True or false: a big, easy tap area is good button design. (a) True (b) False
  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 Send button is 40 px tall. How many px taller must it be?
  20. 20.True or false: space between buttons is good button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Done button: 36 px tall
    Save button: 60 px tall     (a) Send (b) Done (c) Save
  22. 22.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on white (d) yellow on white
  23. 23.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) yellow on white (d) black on yellow
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Next button: 40 px tall
    Save button: 72 px tall
    Back button: 72 px tall     (a) Next (b) Save (c) Back (d) Start
  25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  28. 28.True or false: icons with no meaning is poor button design. (a) False (b) True
  29. 29.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  30. 30.True or false: buttons almost touching is good button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 56 px tall
    Send button: 32 px tall     (a) Send (b) Done (c) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 32 px tall
    Start button: 48 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Help button: 60 px tall
    Next button: 52 px tall     (a) Next (b) Done (c) Help
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 40 px tall
    Next button: 48 px tall
  36. 36.True or false: a clear word like Save is poor button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Help button: 52 px tall
    Next button: 60 px tall
    Start button: 56 px tall     (a) Help (b) Next (c) Start (d) Cancel
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?

Answer key

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

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