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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 285 · 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) light grey on white (b) red on green (c) pale pink on white (d) black on yellow
  2. 2.True or false: grey text on grey is good button design. (a) False (b) True
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 32 px tall
    Start button: 64 px tall
  4. 4.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) pale pink on white (d) white on dark green
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  6. 6.🌗 Is red on green 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 Send button is 36 px tall. How many px taller must it be?
  8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 32 px tall
    Next button: 60 px tall
    Back button: 48 px tall     (a) Back (b) Save (c) Start (d) Next
  10. 10.True or false: space between buttons is good button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 40 px tall
    Send button: 56 px tall
    Back button: 64 px tall     (a) Save (b) Help (c) Send (d) Back
  13. 13.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) yellow on white (d) white on dark green
  14. 14.True or false: strong colour contrast is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Done button: 64 px tall
    Send button: 40 px tall
    Save button: 52 px tall     (a) Done (b) Back (c) Save (d) Send
  16. 16.True or false: space between buttons is poor button design. (a) True (b) False
  17. 17.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) pale pink on white (d) dark blue on black
  19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 60 px tall
    Start button: 56 px tall     (a) Help (b) Start (c) Save
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Start button: 56 px tall
    Help button: 64 px tall     (a) Cancel (b) Help (c) Start
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 40 px tall
    Done button: 56 px tall
    Save button: 56 px tall
  24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 44 px tall
    Done button: 52 px tall     (a) Send (b) Done (c) Cancel
  27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 32 px tall
    Next button: 64 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Back button: 52 px tall
    Help button: 44 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 64 px tall
    Next button: 56 px tall
    Send button: 48 px tall
  33. 33.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) light grey on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 28 px tall
    Help button: 64 px tall     (a) Back (b) Start (c) Help
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Help button: 32 px tall
    Save button: 48 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 40 px tall
    Next button: 56 px tall
    Send button: 52 px tall     (a) Cancel (b) Send (c) Help (d) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 40 px tall
    Back button: 52 px tall
    Next button: 72 px tall     (a) Back (b) Cancel (c) Next (d) Help
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 32 px tall
    Back button: 56 px tall
    Next button: 64 px tall
  39. 39.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  40. 40.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) red on green (d) dark blue on white

Answer key

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

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