#66D4D4

Closest named color: Medium Turquoise (#48D1CC). oklch(80.6% 0.101 195.3), rgb(102, 212, 212).

Black text reads best on this color (11.93:1).

About this color

#66D4D4 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.101 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.026 away. Black text reads best on it, at 11.93:1.

Hue family	Teals and cyans
Lightness	light (81%)
Chroma	moderately saturated (0.101)
Temperature	cool
Nearest name	Medium Turquoise (#48D1CC)
Black text	11.93:1
White text	1.75:1

Values

HEX	#66D4D4
RGB	rgb(102, 212, 212)
HSL	hsl(180, 56%, 62%)
OKLCH	oklch(80.6% 0.101 195.3)

Contrast

WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.

Pair	WCAG 2	Result	APCA	APCA guidance
White text on #66D4D4	1.75:1	Fails	Lc -35.9	Non-text elements, placeholder text
Black text on #66D4D4	11.93:1	AAA	Lc 71.8	Content text, not long reading
#66D4D4 text on white	1.75:1	Fails	Lc 32.0	Non-text elements, placeholder text
#66D4D4 text on black	11.93:1	AAA	Lc -70.7	Content text, not long reading

Tints and shades

A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.

Step 50
50

#ECF8F8

oklch(97% 0.013 196.9)
Step 100
100

#D5F0F0

oklch(93.6% 0.028 196.7)
Step 200
200

#AEE5E5

oklch(88.4% 0.056 196.2)
Step 300
300 (this color)

#66D4D4

oklch(80.6% 0.101 195.3)
Step 400
400

#00B7B8

oklch(70.6% 0.12 195.5)
Step 500
500

#009D9E

oklch(63.1% 0.108 195.6)
Step 600
600

#008485

oklch(55.6% 0.095 195.7)
Step 700
700

#006F70

oklch(49.1% 0.084 195.9)
Step 800
800

#005B5B

oklch(42.7% 0.073 194.8)
Step 900
900

#004C4C

oklch(37.7% 0.064 194.8)
Step 950
950

#002D2D

oklch(26.9% 0.046 194.8)

Export this scale for Tailwind in the Tailwind colors tool

#66D4D4 with color blindness

Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.

Vision	Seen as	Shift (ΔE)
Protanopia (no red cones)	#C8CBD4	0.105
Deuteranopia (no green cones)	#B6BDD5	0.099
Tritanopia (no blue cones)	#00DAD4	0.038
Achromatopsia (no color)	#C3C3C3	0.101