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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 609 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 40 px tall
    Save button: 52 px tall     (a) Help (b) Save (c) Cancel
  2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on black (d) light grey on white
  4. 4.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) pale pink on white (d) light grey on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 56 px tall
    Cancel button: 32 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Help button: 68 px tall
    Save button: 40 px tall     (a) Back (b) Save (c) Help
  7. 7.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) white on black (d) dark blue on white
  8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 40 px tall
    Save button: 60 px tall
    Help button: 60 px tall     (a) Next (b) Help (c) Save (d) Done
  10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  13. 13.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Send button: 56 px tall
    Help button: 36 px tall
    Save button: 36 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Start button: 48 px tall
    Save button: 52 px tall
    Help button: 56 px tall     (a) Save (b) Help (c) Done (d) Start
  16. 16.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Help button: 48 px tall
    Cancel button: 64 px tall
    Save button: 52 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Done button: 68 px tall
    Help button: 72 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Help (c) Done (d) Start
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 64 px tall
    Cancel button: 40 px tall
    Send button: 52 px tall
  21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 56 px tall
    Cancel button: 52 px tall
    Back button: 36 px tall     (a) Save (b) Cancel (c) Back (d) Next
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Save button: 52 px tall
    Next button: 36 px tall
  24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  25. 25.True or false: grey text on grey is good button design. (a) True (b) False
  26. 26.True or false: space between buttons is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 56 px tall
    Cancel button: 28 px tall
    Done button: 72 px tall     (a) Done (b) Start (c) Cancel (d) Save
  28. 28.True or false: grey text on grey is poor button design. (a) True (b) False
  29. 29.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) pale pink on white (d) black on yellow
  30. 30.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on dark green (d) pale pink on white
  31. 31.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) black on pale grey
  32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) dark blue on black (d) black on yellow
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Send button: 56 px tall
    Cancel button: 64 px tall
    Back button: 36 px tall     (a) Start (b) Back (c) Send (d) Cancel
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Back button: 44 px tall
    Next button: 44 px tall
    Done button: 48 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Send button: 72 px tall
    Start button: 72 px tall     (a) Send (b) Back (c) Start
  38. 38.True or false: strong colour contrast is poor button design. (a) True (b) False
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 64 px tall
    Cancel button: 48 px tall

Answer key

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

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