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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 84 · 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 pale grey (b) black on yellow (c) light grey on white (d) white on black
  2. 2.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) yellow on white (d) red on green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 36 px tall
    Help button: 32 px tall
    Back button: 36 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Cancel button: 72 px tall
    Save button: 52 px tall     (a) Cancel (b) Save (c) Next
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 32 px tall
    Help button: 40 px tall
    Done button: 36 px tall
  6. 6.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) pale pink on white
  8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) yellow on white (d) white on black
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  13. 13.True or false: a tiny 20 px button is good button design. (a) False (b) True
  14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 28 px tall
    Cancel button: 64 px tall     (a) Cancel (b) Help (c) Start
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Start button: 64 px tall
    Back button: 40 px tall
  17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 64 px tall
    Save button: 60 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Back button: 52 px tall
    Start button: 48 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 48 px tall
    Cancel button: 48 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Back button: 48 px tall
    Save button: 40 px tall     (a) Back (b) Save (c) Start
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 72 px tall
    Done button: 32 px tall
    Save button: 60 px tall     (a) Done (b) Start (c) Help (d) Save
  25. 25.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) pale pink on white (d) dark blue on black
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 52 px tall
    Back button: 48 px tall
    Send button: 64 px tall     (a) Send (b) Back (c) Cancel (d) Help
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 60 px tall
    Start button: 56 px tall
    Cancel button: 24 px tall     (a) Help (b) Done (c) Cancel (d) Start
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  29. 29.True or false: icons with no meaning is good button design. (a) True (b) False
  30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 48 px tall
    Send button: 52 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Start button: 48 px tall
    Back button: 32 px tall
    Save button: 60 px tall
  33. 33.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on black (d) dark blue on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 64 px tall
    Send button: 64 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Done button: 40 px tall
    Send button: 36 px tall
    Next button: 36 px tall
  36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.True or false: strong colour contrast is good button design. (a) False (b) True
  38. 38.True or false: icons with no meaning is poor button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 60 px tall
    Cancel button: 28 px tall
    Send button: 52 px tall     (a) Cancel (b) Save (c) Send (d) Start
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?

Answer key

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

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