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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 380 · 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. How many of these buttons follow the rule?
    Start button: 60 px tall
    Save button: 44 px tall
    Help button: 32 px tall
  2. 2.True or false: grey text on grey is poor button design. (a) False (b) True
  3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 52 px tall
    Save button: 60 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Save button: 68 px tall
    Start button: 52 px tall     (a) Start (b) Done (c) Save
  8. 8.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) black on pale grey (d) white on black
  9. 9.True or false: grey text on grey is good button design. (a) True (b) False
  10. 10.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) red on green (d) yellow on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Save button: 40 px tall
    Back button: 36 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 44 px tall
    Send button: 40 px tall
    Next button: 64 px tall
  13. 13.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) dark blue on white (d) white on black
  14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  15. 15.True or false: a big, easy tap area is poor button design. (a) True (b) False
  16. 16.True or false: buttons almost touching is good button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Next button: 68 px tall
    Start button: 48 px tall
    Send button: 68 px tall     (a) Start (b) Send (c) Next (d) Cancel
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 44 px tall
    Save button: 32 px tall
    Next button: 56 px tall
  19. 19.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 44 px tall
    Back button: 32 px tall
  21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  23. 23.True or false: a big, easy tap area is good button design. (a) False (b) True
  24. 24.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 44 px tall
    Cancel button: 44 px tall
    Start button: 64 px tall
  29. 29.True or false: strong colour contrast is poor button design. (a) False (b) True
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 32 px tall
    Back button: 36 px tall
  31. 31.True or false: buttons almost touching is poor button design. (a) True (b) False
  32. 32.True or false: a clear word like Save is good button design. (a) True (b) False
  33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Back button: 48 px tall
    Start button: 28 px tall
    Save button: 48 px tall     (a) Start (b) Save (c) Cancel (d) Back
  35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) white on dark green
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  38. 38.True or false: space between buttons is good button design. (a) True (b) False
  39. 39.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) pale pink on white
  40. 40.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on black (d) white on black

Answer key

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

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