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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 634 · 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.

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

Answer key

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

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