← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 252 · 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.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) pale pink on white
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 48 px tall
    Send button: 60 px tall
  3. 3.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) yellow on white (d) red on green
  4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  8. 8.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) dark blue on white (d) black on yellow
  9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 36 px tall
    Next button: 68 px tall
    Done button: 60 px tall     (a) Done (b) Next (c) Help (d) Start
  11. 11.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) pale pink on white (d) yellow on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 36 px tall
    Back button: 48 px tall
    Done button: 36 px tall
  13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
  17. 17.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.True or false: space between buttons is poor button design. (a) True (b) False
  19. 19.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  21. 21.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) dark blue on white (d) white on dark green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Done button: 52 px tall
    Back button: 72 px tall
    Start button: 48 px tall     (a) Done (b) Back (c) Save (d) Start
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Help button: 48 px tall
    Start button: 52 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 48 px tall
    Done button: 24 px tall
    Save button: 60 px tall     (a) Send (b) Help (c) Done (d) Save
  25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 24 px tall
    Back button: 52 px tall     (a) Back (b) Done (c) Cancel
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Done button: 40 px tall
    Back button: 60 px tall
    Start button: 52 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Cancel button: 40 px tall
    Save button: 48 px tall
    Next button: 64 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 32 px tall
    Back button: 44 px tall
    Cancel button: 40 px tall
  32. 32.🔘 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
    Done button: 60 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 56 px tall
    Save button: 40 px tall
    Start button: 48 px tall     (a) Send (b) Help (c) Save (d) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  35. 35.🔘 Is this good or poor button design: grey text on grey? (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?
    Cancel button: 44 px tall
    Next button: 56 px tall
    Send button: 64 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 36 px tall
    Start button: 68 px tall
    Back button: 64 px tall     (a) Help (b) Back (c) Start (d) Done
  39. 39.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  40. 40.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students