App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 463 · 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: icons with no meaning is good button design. (a) True (b) False
2. 2.True or false: strong colour contrast is good button design. (a) False (b) True
3. 3.True or false: strong colour contrast is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 24 px tall
   Send button: 68 px tall
   Help button: 60 px tall (a) Next (b) Send (c) Help
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: a tiny 20 px button is good button design. (a) False (b) True
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) black on pale grey
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
10. 10.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) yellow on white
11. 11.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) pale pink on white
12. 12.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 40 px tall
    Start button: 48 px tall
    Back button: 64 px tall (a) Start (b) Back (c) Next (d) Save
14. 14.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on black (d) black on yellow
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Start button: 64 px tall
    Cancel button: 32 px tall (a) Start (b) Save (c) Cancel
16. 16.True or false: a big, easy tap area is good button design. (a) False (b) True
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Start button: 72 px tall
    Back button: 24 px tall (a) Send (b) Start (c) Back
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) dark blue on white (d) white on dark green
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Done button: 64 px tall
    Next button: 32 px tall
    Help button: 64 px tall
24. 24.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) dark blue on black (d) light grey on white
25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 64 px tall
    Back button: 32 px tall
30. 30.🌗 Is white on black 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. How many of these buttons follow the rule?
    Back button: 60 px tall
    Help button: 64 px tall
    Send button: 44 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 56 px tall
    Next button: 40 px tall (a) Help (b) Save (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 72 px tall
    Send button: 28 px tall (a) Next (b) Save (c) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 64 px tall
    Save button: 44 px tall
    Back button: 44 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.True or false: a big, easy tap area is poor button design. (a) True (b) False
39. 39.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on black (d) red on green
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 52 px tall
    Done button: 52 px tall

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