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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 481 · 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.

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

Answer key

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

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