App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 292 · 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.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 40 px tall
   Cancel button: 52 px tall
   Next button: 56 px tall
6. 6.True or false: strong colour contrast is good button design. (a) True (b) False
7. 7.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) white on dark green (d) black on yellow
8. 8.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) light grey on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) white on black
11. 11.True or false: strong colour contrast is poor button design. (a) True (b) False
12. 12.True or false: a big, easy tap area is poor button design. (a) False (b) True
13. 13.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) yellow on white (d) light grey on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Done button: 44 px tall
    Cancel button: 52 px tall
15. 15.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) black on yellow (d) dark blue on white
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Save button: 56 px tall
    Done button: 52 px tall
18. 18.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) yellow on white (d) pale pink on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 60 px tall
    Send button: 56 px tall
    Next button: 44 px tall (a) Done (b) Help (c) Send (d) Next
20. 20.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) red on green
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
22. 22.True or false: a big, easy tap area is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Send button: 52 px tall
    Next button: 32 px tall
    Done button: 60 px tall
25. 25.🌗 Is yellow on white 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. Which button is too small?
    Send button: 60 px tall
    Next button: 24 px tall
    Save button: 64 px tall (a) Next (b) Save (c) Send
27. 27.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on yellow (d) dark blue on black
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Back button: 52 px tall
    Cancel button: 48 px tall (a) Back (b) Send (c) Cancel
30. 30.True or false: a clear word like Save is good button design. (a) True (b) False
31. 31.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 36 px tall
    Help button: 56 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Send button: 48 px tall
    Help button: 56 px tall
    Save button: 56 px tall (a) Help (b) Send (c) Save (d) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 56 px tall
    Next button: 52 px tall
    Send button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Send button: 52 px tall
    Next button: 44 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 52 px tall
    Done button: 64 px tall
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Send button: 64 px tall
    Save button: 32 px tall (a) Send (b) Save (c) Help
40. 40.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read

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