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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 459 · 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 dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 56 px tall
    Help button: 36 px tall
    Save button: 72 px tall     (a) Help (b) Save (c) Cancel (d) Start
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 48 px tall
    Cancel button: 44 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Save button: 52 px tall
    Cancel button: 52 px tall     (a) Save (b) Cancel (c) Done
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 32 px tall
    Done button: 32 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  7. 7.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) dark blue on black (d) pale pink on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Send button: 56 px tall
    Back button: 52 px tall
    Start button: 56 px tall     (a) Back (b) Start (c) Cancel (d) Send
  10. 10.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  14. 14.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 32 px tall
    Cancel button: 36 px tall
    Done button: 60 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
  19. 19.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  20. 20.True or false: icons with no meaning is poor button design. (a) False (b) True
  21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Back button: 52 px tall
    Help button: 52 px tall     (a) Help (b) Back (c) Done
  26. 26.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) dark blue on black
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 64 px tall
    Help button: 60 px tall
    Back button: 32 px tall
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  29. 29.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Done button: 40 px tall
    Help button: 48 px tall
  31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Save button: 32 px tall
    Next button: 64 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 24 px tall
    Save button: 68 px tall     (a) Save (b) Cancel (c) Next
  35. 35.True or false: strong colour contrast is poor button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  37. 37.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) red on green (d) black on pale grey
  39. 39.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) pale pink on white (d) black on yellow
  40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design

Answer key

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

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