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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 520 · 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: 64 px tall
    Send button: 32 px tall
    Back button: 40 px tall
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  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. Which button is too small?
    Cancel button: 52 px tall
    Start button: 60 px tall
    Save button: 24 px tall     (a) Cancel (b) Start (c) Save
  5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  6. 6.True or false: strong colour contrast is poor button design. (a) True (b) False
  7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 40 px tall
    Save button: 52 px tall
    Start button: 52 px tall     (a) Save (b) Start (c) Help (d) Send
  9. 9.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) dark blue on black
  10. 10.True or false: grey text on grey is good button design. (a) True (b) False
  11. 11.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) black on yellow (d) white on black
  12. 12.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) light grey on white (d) white on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 48 px tall
    Start button: 56 px tall
    Done button: 32 px tall
  14. 14.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
  17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 56 px tall
    Save button: 56 px tall
    Back button: 52 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Save button: 48 px tall
    Cancel button: 72 px tall
    Help button: 68 px tall     (a) Cancel (b) Save (c) Send (d) Help
  21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 72 px tall
    Back button: 52 px tall
    Cancel button: 44 px tall     (a) Help (b) Done (c) Back (d) Cancel
  24. 24.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) dark blue on white (d) pale pink on white
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Done button: 32 px tall
    Cancel button: 60 px tall
    Save button: 48 px tall     (a) Cancel (b) Save (c) Help (d) Done
  26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 52 px tall
    Send button: 48 px tall
    Start button: 52 px tall
  28. 28.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) pale pink on white (d) white on black
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 40 px tall
    Save button: 32 px tall
  31. 31.True or false: a big, easy tap area is poor button design. (a) False (b) True
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Cancel button: 36 px tall
    Start button: 36 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 32 px tall
    Help button: 44 px tall
  34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  35. 35.True or false: strong colour contrast is good button design. (a) False (b) True
  36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Help button: 68 px tall
    Cancel button: 60 px tall     (a) Start (b) Cancel (c) Help
  39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  40. 40.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) yellow on white (d) light grey on white

Answer key

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

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