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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 629 · 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 this good or poor button design: strong colour contrast? (a) poor design (b) good design
  2. 2.True or false: icons with no meaning is poor button design. (a) False (b) True
  3. 3.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) black on pale grey (d) white on black
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Done button: 56 px tall
    Help button: 64 px tall
    Cancel button: 72 px tall     (a) Help (b) Done (c) Back (d) Cancel
  5. 5.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on white (d) red on green
  6. 6.True or false: grey text on grey is good button design. (a) True (b) False
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 40 px tall
    Help button: 48 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 52 px tall
    Done button: 48 px tall
    Start button: 72 px tall     (a) Cancel (b) Done (c) Back (d) Start
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 44 px tall
    Send button: 36 px tall
    Done button: 32 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 52 px tall
    Back button: 44 px tall
    Send button: 44 px tall
  11. 11.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) black on pale grey
  12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  13. 13.🌗 Is pale pink 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. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 44 px tall
    Next button: 56 px tall
    Save button: 60 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 52 px tall
    Start button: 28 px tall
    Help button: 64 px tall     (a) Help (b) Save (c) Start (d) Cancel
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Help button: 68 px tall
    Save button: 36 px tall     (a) Help (b) Save (c) Next
  17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Save button: 36 px tall
    Start button: 64 px tall
    Next button: 56 px tall
  19. 19.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) black on pale grey
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  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: 48 px tall
    Send button: 64 px tall
    Next button: 24 px tall     (a) Next (b) Save (c) Send
  23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Back button: 48 px tall
    Cancel button: 60 px tall     (a) Back (b) Save (c) Cancel
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 52 px tall
    Save button: 44 px tall
    Send button: 32 px tall
  26. 26.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) light grey on white (d) red on green
  27. 27.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 56 px tall
    Help button: 36 px tall
    Done button: 68 px tall     (a) Help (b) Cancel (c) Next (d) Done
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) black on pale grey
  34. 34.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) light grey on white (d) pale pink on white
  35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 64 px tall
    Start button: 44 px tall
    Help button: 44 px tall
  37. 37.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) dark blue on white
  38. 38.True or false: icons with no meaning is good button design. (a) True (b) False
  39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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