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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 621 · 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: grey text on grey? (a) good design (b) poor design
  2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  6. 6.🌗 Is black on pale grey 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 Next button is 36 px tall. How many px taller must it be?
  8. 8.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) black on yellow
  9. 9.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Send button: 36 px tall
    Save button: 40 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  13. 13.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) pale pink on white (d) yellow on white
  14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  16. 16.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) pale pink on white
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  18. 18.True or false: buttons almost touching is poor button design. (a) True (b) False
  19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  21. 21.True or false: grey text on grey is good button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Help button: 24 px tall
    Next button: 48 px tall     (a) Next (b) Send (c) Help
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 56 px tall
    Help button: 60 px tall
    Back button: 32 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 52 px tall
    Help button: 36 px tall
  25. 25.True or false: grey text on grey is poor button design. (a) True (b) False
  26. 26.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 48 px tall
    Done button: 48 px tall
  28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Start button: 52 px tall
    Save button: 44 px tall     (a) Help (b) Save (c) Start
  30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Cancel button: 48 px tall
    Back button: 56 px tall     (a) Back (b) Cancel (c) Next
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 48 px tall
    Cancel button: 56 px tall
  33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Help button: 60 px tall
    Next button: 64 px tall
    Back button: 64 px tall
  35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 28 px tall
    Help button: 68 px tall
    Cancel button: 52 px tall     (a) Help (b) Send (c) Next (d) Cancel
  37. 37.True or false: strong colour contrast is poor button design. (a) False (b) True
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Cancel button: 52 px tall
    Send button: 56 px tall
    Help button: 52 px tall     (a) Cancel (b) Send (c) Help (d) Start
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 60 px tall
    Done button: 28 px tall     (a) Save (b) Next (c) Done
  40. 40.True or false: space between buttons is poor button design. (a) False (b) True

Answer key

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

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