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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 118 · 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 easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) white on dark green
  2. 2.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on yellow
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  4. 4.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) dark blue on white (d) black on yellow
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Send button: 32 px tall
    Start button: 60 px tall     (a) Help (b) Send (c) Start
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.True or false: buttons almost touching is poor button design. (a) True (b) False
  8. 8.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 48 px tall
    Save button: 60 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  11. 11.True or false: icons with no meaning is good button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 72 px tall
    Done button: 32 px tall     (a) Done (b) Back (c) Cancel
  13. 13.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on white (d) dark blue on black
  14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  15. 15.True or false: a big, easy tap area is good button design. (a) True (b) False
  16. 16.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) dark blue on white (d) black on pale grey
  17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Done button: 56 px tall
    Save button: 68 px tall     (a) Back (b) Done (c) Save
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Start button: 56 px tall
    Help button: 60 px tall
    Done button: 36 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Back button: 48 px tall
    Help button: 40 px tall
    Next button: 44 px tall
  24. 24.True or false: space between buttons is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 36 px tall
    Start button: 60 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Next button: 60 px tall
    Save button: 64 px tall
  27. 27.True or false: a tiny 20 px button is good button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 48 px tall
    Back button: 56 px tall
    Next button: 24 px tall     (a) Cancel (b) Next (c) Back (d) Save
  30. 30.True or false: strong colour contrast is good button design. (a) False (b) True
  31. 31.True or false: a clear word like Save is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Back button: 40 px tall
    Done button: 68 px tall     (a) Save (b) Back (c) Done
  33. 33.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) dark blue on white (d) black on yellow
  34. 34.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  37. 37.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) dark blue on white
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Send button: 56 px tall
    Help button: 32 px tall     (a) Help (b) Save (c) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  40. 40.True or false: strong colour contrast is poor button design. (a) True (b) False

Answer key

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

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