#66BDB2
Closest named color: Topaz (#13BBAF). oklch(74.1% 0.086 184.9), rgb(102, 189, 178).
Aa
Black text reads best on this color (9.48:1).
About this color
#66BDB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.086 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.045 away. Black text reads best on it, at 9.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.48:1 |
| White text | 2.21:1 |
Values
| HEX | #66BDB2 |
| RGB | rgb(102, 189, 178) |
| HSL | hsl(172, 40%, 57%) |
| OKLCH | oklch(74.1% 0.086 184.9) |
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 #66BDB2 | 2.21:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #66BDB2 | 9.48:1 | AAA | Lc 60.5 | Content text, not long reading |
| #66BDB2 text on white | 2.21:1 | Fails | Lc 43.4 | Non-text elements, placeholder text |
| #66BDB2 text on black | 9.48:1 | AAA | Lc -58.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F6
oklch(97.1% 0.008 186.9)
-
Step 100
100
#DFEDEB
oklch(93.5% 0.015 186.7)
-
Step 200
200
#C4E0DB
oklch(88.5% 0.03 183.7)
-
Step 300
300
#9ACCC5
oklch(80.8% 0.053 185.6)
-
Step 400
400 (this color)
#66BDB2
oklch(74.1% 0.086 184.9)
-
Step 500
500
#089F92
oklch(63.2% 0.11 184.6)
-
Step 600
600
#00867B
oklch(55.7% 0.098 184.8)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#032D29
oklch(26.8% 0.045 185.3)
#66BDB2 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) | #B5B5B2 | 0.091 |
| Deuteranopia (no green cones) | #A7AAB3 | 0.086 |
| Tritanopia (no blue cones) | #3EC0B9 | 0.027 |
| Achromatopsia (no color) | #AEAEAE | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BDB2
#66BDB2
oklch(74.1% 0.086 184.9)
- #DA94A4
#DA94A4
oklch(74% 0.087 4.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #66BDB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.045
- Pale Teal #82CBB2 ΔE 0.051
- Medium Aquamarine #66CDAA ΔE 0.051
- Muted Teal #90B494 ΔE 0.053
- Medium Turquoise #48D1CC ΔE 0.056
- Greeny Blue #42B395 ΔE 0.057
- Light Sea Green #20B2AA ΔE 0.057
- Dark Sea Green #8FBC8F ΔE 0.058
Use #66BDB2 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.