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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 682 · 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.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  2. 2.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) white on dark green (d) black on pale grey
  3. 3.True or false: buttons almost touching is poor button design. (a) False (b) True
  4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Cancel button: 32 px tall
    Save button: 60 px tall     (a) Cancel (b) Save (c) Start
  11. 11.True or false: space between buttons is good button design. (a) False (b) True
  12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  14. 14.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on dark green (d) black on yellow
  15. 15.True or false: grey text on grey is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 68 px tall
    Next button: 32 px tall     (a) Start (b) Next (c) Send
  17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) pale pink on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  21. 21.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) yellow on white
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 28 px tall
    Help button: 60 px tall
    Back button: 52 px tall     (a) Back (b) Help (c) Save (d) Next
  23. 23.🔘 Is this good or poor button design: grey text on grey? (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?
    Help button: 40 px tall
    Save button: 60 px tall
    Done button: 40 px tall
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 48 px tall
    Save button: 28 px tall
    Cancel button: 56 px tall     (a) Next (b) Send (c) Cancel (d) Save
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Done button: 32 px tall
    Cancel button: 32 px tall
    Next button: 44 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  29. 29.True or false: buttons almost touching is good button design. (a) True (b) False
  30. 30.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) light grey on white
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Next button: 72 px tall
    Send button: 32 px tall
    Help button: 64 px tall     (a) Send (b) Cancel (c) Next (d) Help
  33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
  34. 34.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.True or false: a big, easy tap area is good button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Done button: 44 px tall
    Send button: 36 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  40. 40.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

  1. 8
  2. red on green
  3. True
  4. True
  5. 12
  6. easy to read
  7. hard to read
  8. hard to read
  9. poor design
  10. Cancel
  11. True
  12. hard to read
  13. poor design
  14. yellow on white
  15. False
  16. Next
  17. easy to read
  18. black on pale grey
  19. 4
  20. 24
  21. dark blue on white
  22. Next
  23. poor design
  24. 1
  25. False
  26. Save
  27. 0
  28. 12
  29. False
  30. white on dark green
  31. 12
  32. Send
  33. False
  34. hard to read
  35. True
  36. 20
  37. 1
  38. 28
  39. 8
  40. easy to read

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