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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 244 · 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) dark blue on black (b) black on pale grey (c) white on black (d) white on dark green
  2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 64 px tall
    Back button: 52 px tall
  5. 5.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) dark blue on black (d) light grey on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 64 px tall
    Save button: 52 px tall     (a) Cancel (b) Back (c) Save
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 60 px tall
    Send button: 44 px tall
    Next button: 36 px tall
  11. 11.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) yellow on white (d) red on green
  12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Done button: 68 px tall
    Save button: 48 px tall     (a) Save (b) Done (c) Start
  14. 14.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on yellow (d) dark blue on black
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Done button: 72 px tall
    Next button: 44 px tall     (a) Back (b) Done (c) Next
  16. 16.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on black (d) dark blue on black
  17. 17.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Save button: 64 px tall
    Done button: 56 px tall
  19. 19.True or false: strong colour contrast is poor button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Cancel button: 44 px tall
    Next button: 48 px tall     (a) Next (b) Cancel (c) Done
  21. 21.True or false: a clear word like Save is good button design. (a) True (b) False
  22. 22.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) yellow on white
  23. 23.True or false: space between buttons is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Done button: 56 px tall
    Cancel button: 56 px tall
    Back button: 44 px tall     (a) Cancel (b) Done (c) Back (d) Send
  25. 25.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on pale grey (d) white on dark green
  26. 26.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on white (d) red on green
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 68 px tall
    Start button: 56 px tall     (a) Start (b) Cancel (c) Help
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Cancel button: 68 px tall
    Send button: 48 px tall     (a) Send (b) Next (c) Cancel
  33. 33.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  34. 34.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) dark blue on black (d) yellow on white
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  36. 36.True or false: strong colour contrast is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Back button: 68 px tall
    Save button: 56 px tall     (a) Cancel (b) Back (c) Save
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Back button: 56 px tall
    Cancel button: 36 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 52 px tall
    Send button: 40 px tall
    Help button: 40 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?

Answer key

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

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