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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 319 · 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 black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) yellow on white (d) dark blue on white
  4. 4.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) red on green
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 60 px tall
    Save button: 52 px tall
    Next button: 56 px tall     (a) Back (b) Save (c) Next (d) Cancel
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 48 px tall
    Done button: 24 px tall     (a) Done (b) Send (c) Back
  10. 10.True or false: grey text on grey is good button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 48 px tall
    Save button: 36 px tall
    Send button: 48 px tall
  12. 12.True or false: a tiny 20 px button is good button design. (a) True (b) False
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Done button: 56 px tall
    Back button: 32 px tall
    Send button: 68 px tall     (a) Start (b) Send (c) Done (d) Back
  14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Cancel button: 24 px tall
    Back button: 52 px tall     (a) Start (b) Back (c) Cancel
  16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 48 px tall
    Done button: 64 px tall
    Help button: 36 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Cancel button: 56 px tall
    Save button: 72 px tall
    Done button: 52 px tall     (a) Help (b) Save (c) Cancel (d) Done
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Cancel button: 72 px tall
    Send button: 56 px tall
    Start button: 24 px tall     (a) Cancel (b) Start (c) Send (d) Done
  20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 40 px tall
    Start button: 32 px tall
    Send button: 60 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 48 px tall
    Cancel button: 52 px tall
    Help button: 40 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 64 px tall
    Cancel button: 36 px tall
    Back button: 36 px tall
  25. 25.True or false: a clear word like Save is good button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Cancel button: 72 px tall
    Back button: 60 px tall     (a) Back (b) Help (c) Cancel
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 28 px tall
    Help button: 52 px tall
    Start button: 48 px tall     (a) Start (b) Save (c) Help (d) Cancel
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Back button: 72 px tall
    Help button: 68 px tall
    Cancel button: 68 px tall     (a) Back (b) Help (c) Cancel (d) Save
  29. 29.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 32 px tall
    Save button: 32 px tall
  31. 31.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on white (d) light grey on white
  32. 32.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) black on yellow
  33. 33.True or false: icons with no meaning is good button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Send button: 56 px tall
    Done button: 60 px tall     (a) Done (b) Send (c) Save
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  37. 37.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) dark blue on black
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Next button: 24 px tall
    Help button: 72 px tall
    Back button: 48 px tall     (a) Back (b) Next (c) Done (d) Help
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?

Answer key

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

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