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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 278 · 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) dark blue on white (b) pale pink on white (c) white on dark green (d) white on black
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Help button: 64 px tall
    Save button: 36 px tall
  3. 3.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) white on dark green
  4. 4.True or false: space between buttons is poor button design. (a) True (b) False
  5. 5.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 36 px tall
    Save button: 32 px tall
  8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  9. 9.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 60 px tall
    Save button: 52 px tall
  11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.True or false: icons with no meaning is poor button design. (a) True (b) False
  15. 15.True or false: a clear word like Save is poor button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  19. 19.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) white on black (d) black on pale grey
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  22. 22.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) yellow on white (d) white on dark green
  23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  27. 27.True or false: buttons almost touching is poor button design. (a) False (b) True
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  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: 56 px tall
    Done button: 32 px tall
  31. 31.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) black on yellow
  32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.True or false: buttons almost touching is good 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: 56 px tall
    Start button: 32 px tall
    Save button: 36 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 36 px tall
    Start button: 32 px tall
  37. 37.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Next button: 40 px tall
    Cancel button: 64 px tall
  40. 40.True or false: a tiny 20 px button is good button design. (a) False (b) True

Answer key

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

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