App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 167 · 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: a clear word like Save is good button design. (a) False (b) True
2. 2.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) pale pink on white
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
5. 5.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on pale grey (d) white on black
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) black on pale grey (d) black on yellow
12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
13. 13.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) red on green (d) black on pale grey
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 64 px tall
    Help button: 40 px tall
    Back button: 56 px tall
15. 15.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on pale grey
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 48 px tall
    Cancel button: 56 px tall
    Save button: 44 px tall (a) Save (b) Back (c) Next (d) Cancel
21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
22. 22.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) pale pink on white (d) light grey on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 28 px tall
    Save button: 72 px tall (a) Send (b) Next (c) Save
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 64 px tall
    Help button: 44 px tall (a) Help (b) Done (c) Start
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 56 px tall
    Save button: 36 px tall
    Help button: 60 px tall
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 44 px tall
    Cancel button: 40 px tall
    Done button: 36 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 32 px tall
    Send button: 36 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 60 px tall
    Help button: 32 px tall
    Back button: 60 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Next button: 56 px tall
    Start button: 36 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 56 px tall
    Start button: 48 px tall
    Done button: 32 px tall
36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 68 px tall
    Save button: 44 px tall (a) Save (b) Cancel (c) Start
38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Done button: 40 px tall
    Cancel button: 32 px tall
40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read

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