App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 217 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 60 px tall
   Save button: 28 px tall
   Send button: 60 px tall (a) Save (b) Next (c) Send
2. 2.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) yellow on white (d) light grey on white
3. 3.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) dark blue on white
6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.True or false: a tiny 20 px button is poor button design. (a) True (b) False
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.True or false: buttons almost touching is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Help button: 72 px tall
    Next button: 72 px tall (a) Save (b) Next (c) Help
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
15. 15.True or false: icons with no meaning is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 44 px tall
    Help button: 32 px tall
18. 18.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on pale grey (d) yellow on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 36 px tall
    Save button: 36 px tall
    Send button: 52 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Start button: 52 px tall
    Send button: 60 px tall
    Save button: 68 px tall (a) Next (b) Start (c) Send (d) Save
23. 23.True or false: a clear word like Save is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Cancel button: 60 px tall
    Next button: 56 px tall
25. 25.True or false: a tiny 20 px button is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Send button: 56 px tall
    Done button: 60 px tall (a) Send (b) Start (c) Done
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Back button: 44 px tall
    Next button: 56 px tall
    Cancel button: 44 px tall
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) red on green (d) pale pink on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Send button: 52 px tall
    Done button: 48 px tall (a) Next (b) Done (c) Send
31. 31.True or false: grey text on grey is good button design. (a) True (b) False
32. 32.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Next button: 32 px tall
    Start button: 56 px tall
    Save button: 56 px tall
35. 35.True or false: space between buttons is good button design. (a) True (b) False
36. 36.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) black on yellow (d) white on dark green
37. 37.True or false: strong colour contrast is poor button design. (a) True (b) False
38. 38.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) white on black
39. 39.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) black on pale grey
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?

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