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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 555 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Help button: 64 px tall
    Save button: 60 px tall     (a) Save (b) Help (c) Start
  2. 2.True or false: a tiny 20 px button is good button design. (a) False (b) True
  3. 3.True or false: grey text on grey is poor button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 64 px tall
    Start button: 28 px tall     (a) Start (b) Done (c) Send
  6. 6.True or false: a big, easy tap area is poor button design. (a) True (b) False
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  9. 9.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.True or false: a big, easy tap area is good button design. (a) False (b) True
  11. 11.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) pale pink on white
  13. 13.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) dark blue on black
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 56 px tall
    Cancel button: 52 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Cancel button: 56 px tall
    Next button: 40 px tall
  16. 16.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) dark blue on white
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 64 px tall
    Back button: 48 px tall
  18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) yellow on white (d) pale pink on white
  20. 20.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  21. 21.True or false: icons with no meaning is good button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 52 px tall
    Send button: 68 px tall     (a) Next (b) Send (c) Cancel
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  24. 24.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on pale grey (d) dark blue on white
  25. 25.True or false: a clear word like Save is good button design. (a) True (b) False
  26. 26.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) white on dark green
  27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  28. 28.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) light grey on white
  29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.True or false: strong colour contrast is good button design. (a) True (b) False
  31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on pale grey (d) dark blue on white
  33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  35. 35.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) white on black (d) white on dark green
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  37. 37.True or false: space between buttons is poor button design. (a) True (b) False
  38. 38.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?

Answer key

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

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