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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 7 · 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.

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

Answer key

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

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