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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 89 · 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) black on yellow (b) pale pink on white (c) black on pale grey (d) white on black
  2. 2.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on black (d) white on dark green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Save button: 52 px tall
    Back button: 68 px tall     (a) Back (b) Save (c) Next
  4. 4.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) dark blue on black (d) yellow on white
  5. 5.True or false: a clear word like Save is poor button design. (a) True (b) False
  6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  7. 7.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) yellow on white (d) red on green
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) light grey on white (d) black on pale grey
  10. 10.True or false: icons with no meaning is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 28 px tall
    Start button: 60 px tall
    Done button: 48 px tall     (a) Done (b) Start (c) Save (d) Help
  12. 12.True or false: space between buttons is poor button design. (a) False (b) True
  13. 13.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) black on pale grey
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Save button: 40 px tall
    Send button: 72 px tall     (a) Back (b) Save (c) Send
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  16. 16.True or false: icons with no meaning is poor button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Help button: 68 px tall
    Start button: 36 px tall
    Back button: 60 px tall     (a) Back (b) Cancel (c) Start (d) Help
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Back button: 72 px tall
    Done button: 48 px tall     (a) Back (b) Done (c) Send
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Help button: 60 px tall
    Next button: 56 px tall
    Cancel button: 28 px tall     (a) Next (b) Cancel (c) Done (d) Help
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  25. 25.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) white on black
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 36 px tall
    Back button: 36 px tall
    Help button: 64 px tall
  27. 27.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 32 px tall
    Save button: 36 px tall
    Done button: 48 px tall
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 40 px tall
    Save button: 60 px tall     (a) Save (b) Cancel (c) Start
  32. 32.True or false: strong colour contrast is poor button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Save button: 64 px tall
    Next button: 68 px tall     (a) Next (b) Save (c) Send
  34. 34.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Save button: 72 px tall
    Cancel button: 56 px tall
    Back button: 72 px tall     (a) Done (b) Cancel (c) Back (d) Save
  36. 36.True or false: strong colour contrast is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 44 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Back (c) Done
  40. 40.🔘 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
    Next button: 64 px tall
    Done button: 52 px tall

Answer key

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

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