App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 159 · 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 poor button design. (a) False (b) True
2. 2.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) red on green (d) black on pale grey
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 72 px tall
   Send button: 40 px tall
   Start button: 64 px tall (a) Help (b) Start (c) Send
7. 7.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on yellow (d) black on pale grey
8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) light grey on white (d) black on yellow
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) red on green (d) light grey on white
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
13. 13.True or false: grey text on grey is poor button design. (a) True (b) False
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on dark green (d) yellow on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 60 px tall
    Next button: 56 px tall
16. 16.True or false: icons with no meaning is good button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
18. 18.True or false: a clear word like Save is good button design. (a) False (b) True
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Save button: 64 px tall
    Next button: 64 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Send button: 64 px tall
    Back button: 36 px tall (a) Save (b) Back (c) Send
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 32 px tall
    Help button: 64 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Back button: 36 px tall
    Start button: 64 px tall
    Save button: 56 px tall
25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 68 px tall
    Save button: 40 px tall (a) Next (b) Cancel (c) Save
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Next button: 68 px tall
    Start button: 68 px tall (a) Start (b) Done (c) Next
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) yellow on white (d) white on dark green
29. 29.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) pale pink on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Help button: 44 px tall
    Save button: 40 px tall
    Send 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: 44 px tall
    Back button: 36 px tall
    Next button: 36 px tall
    Start button: 56 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) light grey on white (d) dark blue on black
34. 34.True or false: buttons almost touching is poor button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Save button: 36 px tall
    Back button: 60 px tall
    Send button: 56 px tall (a) Send (b) Save (c) Back (d) Next
36. 36.True or false: a big, easy tap area is good button design. (a) False (b) True
37. 37.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Back button: 40 px tall
    Cancel button: 40 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?

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