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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 602 · 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 white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Done button: 36 px tall
    Send button: 44 px tall
    Next button: 60 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Send button: 64 px tall
    Save button: 68 px tall     (a) Send (b) Save (c) Help
  6. 6.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on black (d) white on black
  7. 7.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) red on green (d) dark blue on white
  10. 10.True or false: grey text on grey is good button design. (a) True (b) False
  11. 11.True or false: space between buttons is good button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  13. 13.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) white on dark green
  14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
  17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  22. 22.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) red on green
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Send button: 64 px tall
    Save button: 60 px tall
    Start button: 40 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  27. 27.True or false: a tiny 20 px button is good button design. (a) False (b) True
  28. 28.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  32. 32.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) pale pink on white
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 72 px tall
    Next button: 48 px tall
    Start button: 44 px tall     (a) Help (b) Next (c) Start (d) Send
  34. 34.True or false: space between buttons is poor button design. (a) False (b) True
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Next button: 48 px tall
    Done button: 60 px tall
  36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 24 px tall
    Send button: 56 px tall     (a) Send (b) Back (c) Next
  38. 38.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
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Start button: 60 px tall
    Save button: 32 px tall
    Next button: 68 px tall     (a) Next (b) Start (c) Save (d) Send
  40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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