App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 439 · 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.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) dark blue on white
2. 2.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) white on dark green (d) white on black
3. 3.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) white on dark green (d) black on pale grey
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) white on dark green
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 72 px tall
    Cancel button: 64 px tall
    Next button: 44 px tall (a) Next (b) Cancel (c) Start (d) Send
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Done button: 32 px tall
    Cancel button: 48 px tall
13. 13.True or false: space between buttons is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 52 px tall
    Save button: 32 px tall
15. 15.True or false: a big, easy tap area is poor button design. (a) False (b) True
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 72 px tall
    Start button: 64 px tall (a) Cancel (b) Save (c) Start
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: icons with no meaning is poor button design. (a) False (b) True
23. 23.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) red on green (d) dark blue on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 44 px tall
    Send button: 36 px tall
    Save button: 48 px tall
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. Which button is too small?
    Cancel button: 52 px tall
    Done button: 24 px tall
    Start button: 68 px tall
    Help button: 68 px tall (a) Cancel (b) Done (c) Start (d) Help
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 36 px tall
    Save button: 64 px tall
    Next button: 64 px tall
28. 28.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 56 px tall
    Done button: 44 px tall (a) Done (b) Cancel (c) Start
31. 31.True or false: strong colour contrast is good button design. (a) False (b) True
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Next button: 44 px tall
    Help button: 52 px tall
    Save button: 56 px tall (a) Back (b) Next (c) Save (d) Help
34. 34.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
36. 36.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) white on black (d) white on dark green
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
38. 38.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) black on pale grey
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Cancel button: 64 px tall
    Start button: 32 px tall
40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

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