App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 324 · 40 questions

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.

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

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