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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 560 · 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) white on dark green (b) pale pink on white (c) black on pale grey (d) dark blue on white
  2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  3. 3.True or false: space between buttons is poor button design. (a) False (b) True
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  5. 5.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) red on green
  6. 6.True or false: a big, easy tap area is good button design. (a) False (b) True
  7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  12. 12.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) light grey on white (d) yellow on white
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Start button: 24 px tall
    Send button: 48 px tall     (a) Send (b) Start (c) Help
  14. 14.True or false: buttons almost touching is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Start button: 36 px tall
    Next button: 32 px tall
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 36 px tall
    Help button: 32 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  22. 22.True or false: grey text on grey is poor button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  24. 24.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) yellow on white
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Cancel button: 40 px tall
    Help button: 56 px tall
    Save button: 60 px tall
  26. 26.True or false: space between buttons is good button design. (a) False (b) True
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 36 px tall
    Help button: 48 px tall     (a) Help (b) Cancel (c) Save
  30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  31. 31.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on yellow (d) white on black
  32. 32.True or false: strong colour contrast is poor button design. (a) False (b) True
  33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 52 px tall
    Start button: 32 px tall
    Send button: 72 px tall     (a) Next (b) Start (c) Save (d) Send
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Help button: 48 px tall
    Save button: 60 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Cancel button: 44 px tall
    Next button: 72 px tall     (a) Back (b) Next (c) Cancel
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?

Answer key

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

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