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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 165 · 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) light grey on white (b) white on black (c) dark blue on white (d) black on yellow
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Done button: 48 px tall
    Send button: 40 px tall     (a) Save (b) Send (c) Done
  3. 3.True or false: strong colour contrast is good button design. (a) True (b) False
  4. 4.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) yellow on white
  5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) pale pink on white (d) white on black
  9. 9.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) dark blue on white (d) black on yellow
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Start button: 68 px tall
    Done button: 72 px tall     (a) Start (b) Done (c) Send
  11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.🌗 Is yellow on white 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. The Done button is 20 px tall. How many px taller must it be?
  15. 15.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 24 px tall
    Done button: 60 px tall
    Cancel button: 60 px tall     (a) Done (b) Start (c) Back (d) Cancel
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 24 px tall
    Save button: 48 px tall     (a) Next (b) Save (c) Done
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Start button: 56 px tall
    Done button: 72 px tall     (a) Help (b) Done (c) Start
  20. 20.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) dark blue on black (d) black on pale grey
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 56 px tall
    Cancel button: 68 px tall
    Send button: 68 px tall     (a) Cancel (b) Back (c) Help (d) Send
  22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  23. 23.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) dark blue on black
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 52 px tall
    Start button: 48 px tall
    Save button: 52 px tall     (a) Send (b) Save (c) Start (d) Cancel
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Next button: 60 px tall
    Save button: 40 px tall
    Back button: 52 px tall     (a) Cancel (b) Save (c) Next (d) Back
  26. 26.True or false: buttons almost touching is good button design. (a) False (b) True
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 64 px tall
    Help button: 48 px tall
    Start button: 68 px tall     (a) Cancel (b) Start (c) Help (d) Back
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 56 px tall
    Start button: 32 px tall
    Cancel button: 52 px tall
  29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.True or false: grey text on grey is good button design. (a) False (b) True
  31. 31.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on dark green (d) dark blue on black
  32. 32.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.True or false: icons with no meaning is poor button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Help button: 36 px tall
    Done button: 36 px tall
    Save button: 52 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 72 px tall
    Cancel button: 28 px tall     (a) Cancel (b) Send (c) Next
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Send button: 52 px tall
    Cancel button: 60 px tall
    Save button: 44 px tall     (a) Save (b) Cancel (c) Send (d) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 64 px tall
    Save button: 24 px tall
    Back button: 48 px tall     (a) Save (b) Back (c) Send (d) Next
  38. 38.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on pale grey (d) red on green
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Done button: 60 px tall
    Save button: 72 px tall     (a) Save (b) Start (c) Done
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?

Answer key

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

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