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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 656 · 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?
    Help button: 44 px tall
    Start button: 52 px tall
    Save button: 68 px tall
    Cancel button: 68 px tall     (a) Start (b) Save (c) Help (d) Cancel
  2. 2.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) dark blue on white
  3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) dark blue on black (d) white on dark green
  4. 4.True or false: a big, easy tap area is poor button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) light grey on white (d) red on green
  7. 7.True or false: a big, easy tap area is good button design. (a) False (b) True
  8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  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?
    Help button: 40 px tall
    Send button: 44 px tall
    Next button: 48 px tall
  12. 12.True or false: a clear word like Save is poor button design. (a) False (b) True
  13. 13.True or false: space between buttons is poor button design. (a) True (b) False
  14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 44 px tall
    Back button: 60 px tall
    Help button: 48 px tall     (a) Save (b) Back (c) Help (d) Cancel
  16. 16.True or false: icons with no meaning is poor button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Next button: 48 px tall
    Send button: 68 px tall
    Help button: 52 px tall     (a) Help (b) Next (c) Send (d) Save
  18. 18.True or false: buttons almost touching is good button design. (a) True (b) False
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 48 px tall
    Save button: 36 px tall
    Start button: 48 px tall
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 40 px tall
    Start button: 60 px tall
    Back button: 64 px tall     (a) Help (b) Next (c) Back (d) Start
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Save button: 56 px tall
    Cancel button: 64 px tall
    Next button: 40 px tall     (a) Cancel (b) Save (c) Done (d) Next
  23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  24. 24.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 32 px tall
    Help button: 44 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  27. 27.True or false: grey text on grey is good button design. (a) True (b) False
  28. 28.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) red on green (d) white on black
  29. 29.True or false: strong colour contrast is good button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 68 px tall
    Help button: 28 px tall
    Start button: 72 px tall     (a) Help (b) Send (c) Back (d) Start
  31. 31.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) pale pink on white (d) yellow on white
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  33. 33.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) dark blue on black (d) pale pink on white
  34. 34.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Start button: 44 px tall
    Back button: 56 px tall     (a) Back (b) Save (c) Start
  37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 56 px tall
    Save button: 44 px tall

Answer key

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

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