App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 490 · 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. The Send button is 40 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
3. 3.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) red on green (d) yellow on white
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Start button: 56 px tall
   Send button: 56 px tall
   Save button: 52 px tall
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) dark blue on white
10. 10.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on white (d) dark blue on black
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 52 px tall
    Done button: 28 px tall (a) Done (b) Send (c) Next
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 48 px tall
    Back button: 44 px tall
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) yellow on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Send button: 52 px tall
    Save button: 44 px tall
18. 18.True or false: icons with no meaning is poor button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 44 px tall
    Send button: 60 px tall (a) Send (b) Save (c) Done
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 60 px tall
    Back button: 56 px tall
    Cancel button: 44 px tall (a) Done (b) Back (c) Help (d) Cancel
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
23. 23.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on dark green (d) yellow on white
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.True or false: a big, easy tap area is good button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Done button: 52 px tall
    Back button: 52 px tall
    Save button: 56 px tall (a) Save (b) Back (c) Done (d) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 52 px tall
    Help button: 72 px tall
    Next button: 28 px tall (a) Back (b) Help (c) Cancel (d) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 56 px tall
    Save button: 40 px tall
    Cancel button: 60 px tall (a) Done (b) Cancel (c) Start (d) Save
29. 29.🌗 Is dark blue on black 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?
    Done button: 36 px tall
    Back button: 60 px tall
    Cancel button: 32 px tall
    Next button: 32 px tall
31. 31.True or false: grey text on grey is good button design. (a) False (b) True
32. 32.True or false: strong colour contrast is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 72 px tall
    Back button: 32 px tall (a) Cancel (b) Back (c) Save
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Start button: 64 px tall
    Done button: 24 px tall (a) Start (b) Back (c) Done
35. 35.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on black (d) dark blue on black
36. 36.🌗 Is yellow on white 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. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 48 px tall
    Save button: 32 px tall
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. The Save button is 40 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design

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