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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 119 · 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 easy to read? (a) black on pale grey (b) light grey on white (c) yellow on white (d) dark blue on black
  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 clear word like Save is good button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 32 px tall
    Done button: 64 px tall     (a) Cancel (b) Help (c) Done
  5. 5.True or false: grey text on grey is poor button design. (a) True (b) False
  6. 6.True or false: buttons almost touching is poor button design. (a) False (b) True
  7. 7.True or false: space between buttons is poor button design. (a) False (b) True
  8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) yellow on white (d) black on yellow
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 40 px tall
    Back button: 72 px tall     (a) Back (b) Cancel (c) Save
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Send button: 56 px tall
    Help button: 40 px tall     (a) Cancel (b) Help (c) Send
  11. 11.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Save button: 44 px tall
    Help button: 56 px tall
    Next button: 40 px tall
  15. 15.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) red on green (d) light grey on white
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 60 px tall
    Cancel button: 40 px tall     (a) Back (b) Save (c) Cancel
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Back button: 60 px tall
    Help button: 52 px tall     (a) Back (b) Cancel (c) Help
  18. 18.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) light grey on white
  19. 19.True or false: strong colour contrast is good button design. (a) True (b) False
  20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 40 px tall
    Done button: 32 px tall
    Send button: 32 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 60 px tall
    Next button: 48 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Save button: 48 px tall
    Send button: 56 px tall
    Done button: 64 px tall     (a) Save (b) Send (c) Cancel (d) Done
  24. 24.True or false: buttons almost touching is good button design. (a) True (b) False
  25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 64 px tall
    Help button: 44 px tall
  27. 27.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 36 px tall
    Send button: 52 px tall     (a) Send (b) Next (c) Start
  29. 29.True or false: strong colour contrast is poor button design. (a) True (b) False
  30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 56 px tall
    Start button: 52 px tall
  35. 35.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) white on dark green
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Save button: 52 px tall
    Start button: 52 px tall
  37. 37.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 72 px tall
    Cancel button: 64 px tall
    Send button: 68 px tall     (a) Back (b) Cancel (c) Help (d) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 36 px tall
    Next button: 52 px tall     (a) Next (b) Help (c) Save
  40. 40.True or false: a big, easy tap area is good button design. (a) False (b) True

Answer key

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

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