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09
COLOR CONTRAST
CALCULATOR
H@dE COLOR CONTRAST CALCULATOR
According to the ADAAG, the color and contrast of detectable warning materials must adhere to the following rule: 705.1.3 Contrast: Detectable Warning
Surfaces shall contrast visually with adjacent walking surfaces either light -on -dark, or dark -on -light.
This tool helps in establishing light -on -dark or dark -on -light contrast differences, allowing the selection of a detectable ADA Tile color and a surrounding
concrete color while displaying a percentage of contrast based on the LRV scale. This percentage of contrast can assist the governing body in developing
the level of contrast that best meets the needs of the community.
What is LRV? Light Reflectance Value (LRV) is a universal value for'contrest'. It measures the proportion of useful light reflected by a colored object. It
represents a relative light and darkness value rather than an actual color, meaning dissimilar colors could have the same LRV. LRV is measured on a scale
of 0 to 100, 0 being an all absorbing black and 100 being an all reflecting white. Concrete
Calor# LRV#
ADA Tile Color Concrete Color
Natural Colors 2 3 14?
5 6 7 $
Charcoal 9 10 11 12
Federal Colors - 13
0 M
Example
Using an LRV of 65 for concrete color 3 (B1), and the LRV
of 3 for the charcoal truncated domes (132), contrast percent
is calculated as follows;
1 75
2 70
3
65
4
54
5
41
6
40
7
35
8
34
9
28
10
27
ADA Tile Color
11
13
12
12
13
6
- Gharcaaaal
Concrete Color
95%
Concrete 3
Contrast percent = [(B1-B2)/B1 ] x 100
= [(65-3)/65] x 100 = 95%
Q O
LEGEND I
iLUMINUM CABINET WITH 0.125"
CES. PAINT COLOR T.B.D. BY
1DHESIVE VINYL GRAPHICS.
FIELD WITH WHITE VINYL
-R 57 CONDENSED
R JUSTIFY ALL TEXT
FINISH CONCRETE
/MOW STRIP - LOCATE SUCH
' CAN BE COVERED BY MULCH
LEGAL NOTICE SIGN 2
SCALE: 3/4"=V-0" LEGAL—NOTICE-01
DATE: 03/
JOB#: 1191
SCALE: NTS
EXHIBIT
I EX.1
0
ISSUES AND REVISIONS
NO. I DATE I ISSUES AND REVISIONS
03.28.19 IALTERNATE MATERIAL EXHIBIT
-------------
620 NCD SURFACE LOT
SCALE: N.T.S. 620 NEWPORT CENTER DRIVE
BY CHECK
RV AM Property Owned & Managed by
Irvine Company
FrA
casco
DESIGN S T U 0 1 0
LICENSE #790706
9850 Irvine Cenfer Dr, Irvine, CA 92618
1: 949.679.6880 1 f: 949.679.6890
ACCESSIBLE PATH -OF -TRAVEL
U.O.N. RUNNING SLOPE NOT TO
EXCEED 1:20 AND CROSS SLOPE
NOT TO EXCEED 1:48.
KEYNOTES
DENOTES NEW FACTORY SEALED
TRUNCATED DOME PAVERS SET IN
0 THINSET. MANUF./PRODUCT: WAUSAU
TILE. ADA -2, COLOR: BLACK (090).
(TYP. FOR 5 AREAS)
NEW LEGAL NOTICE PARKING SIGN
W/ 5MPH SPEED LIMIT DESIGNATION.
SEE DETAIL 2/ -
EXISTING ENTRY/EXIT BARRIER
GATES TO REMAIN.
EXISTING AND NEW CONCRETE WALK
® SURFACE AND GUTTER SURROUNDING
NEW TRUNCATED DOME PAVERS.
(TYP. FOR 5 AREAS)
EXISTING CANOPY ® 98" MIN. HT.
ABOVE TO REMAIN.
620 Newport Ctr.
Alternate Material
620 Newport Center Dr.
Newport Beach, CA 92660
Dr.
Exhibit
Eel