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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 111 · 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) black on yellow (b) white on dark green (c) yellow on white (d) dark blue on white
  2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
  4. 4.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on black (d) black on yellow
  5. 5.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on black
  6. 6.True or false: icons with no meaning is good button design. (a) False (b) True
  7. 7.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.True or false: space between buttons is good button design. (a) False (b) True
  9. 9.True or false: a clear word like Save is good button design. (a) True (b) False
  10. 10.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) dark blue on black (d) red on green
  11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) dark blue on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Cancel button: 56 px tall
    Start button: 28 px tall     (a) Help (b) Cancel (c) Start
  14. 14.True or false: grey text on grey is poor button design. (a) True (b) False
  15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.True or false: a big, easy tap area is poor button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  22. 22.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Next button: 56 px tall
    Save button: 52 px tall     (a) Next (b) Cancel (c) Save
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  25. 25.True or false: grey text on grey is good button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 36 px tall
    Start button: 48 px tall     (a) Cancel (b) Start (c) Save
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  28. 28.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Cancel button: 48 px tall
    Next button: 44 px tall
  31. 31.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Save button: 72 px tall
    Done button: 60 px tall     (a) Done (b) Start (c) Save
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 64 px tall
    Next button: 40 px tall
  35. 35.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) red on green
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  40. 40.True or false: a tiny 20 px button is poor button design. (a) True (b) False

Answer key

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

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