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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 646 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  2. 2.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on dark green (d) pale pink on white
  3. 3.True or false: a big, easy tap area is good button design. (a) False (b) True
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  5. 5.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) yellow on white (d) light grey on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 60 px tall
    Done button: 68 px tall     (a) Next (b) Done (c) Cancel
  7. 7.True or false: a tiny 20 px button is good button design. (a) False (b) True
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 52 px tall
    Start button: 24 px tall     (a) Start (b) Save (c) Help
  9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
  10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  11. 11.Which colour pair is hard to read? (a) white on black (b) red on green (c) white on dark green (d) black on pale grey
  12. 12.True or false: icons with no meaning is good button design. (a) True (b) False
  13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on black (d) yellow on white
  15. 15.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on dark green (d) pale pink on white
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 36 px tall
    Start button: 60 px tall
    Cancel button: 52 px tall     (a) Save (b) Cancel (c) Next (d) Start
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  18. 18.True or false: space between buttons is good button design. (a) False (b) True
  19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  20. 20.True or false: grey text on grey is good button design. (a) True (b) False
  21. 21.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) dark blue on white (d) white on dark green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  23. 23.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) dark blue on black
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  25. 25.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) black on pale grey
  26. 26.True or false: a clear word like Save is good button design. (a) False (b) True
  27. 27.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.True or false: a clear word like Save is poor button design. (a) True (b) False
  29. 29.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
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Send button: 56 px tall
    Next button: 44 px tall
    Save button: 60 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  36. 36.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 48 px tall
    Done button: 32 px tall     (a) Save (b) Cancel (c) Done
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 48 px tall
    Cancel button: 60 px tall
    Send button: 36 px tall
  39. 39.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?

Answer key

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

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