#66BDBA
Closest named color: Topaz (#13BBAF). oklch(74.3% 0.084 192.6), rgb(102, 189, 186).
Aa
Black text reads best on this color (9.55:1).
About this color
#66BDBA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.084 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.049 away. Black text reads best on it, at 9.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.55:1 |
| White text | 2.19:1 |
Values
| HEX | #66BDBA |
| RGB | rgb(102, 189, 186) |
| HSL | hsl(178, 40%, 57%) |
| OKLCH | oklch(74.3% 0.084 192.6) |
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 #66BDBA | 2.19:1 | Fails | Lc -47.9 | Large or bold text, headings |
| Black text on #66BDBA | 9.55:1 | AAA | Lc 60.8 | Content text, not long reading |
| #66BDBA text on white | 2.19:1 | Fails | Lc 43.1 | Non-text elements, placeholder text |
| #66BDBA text on black | 9.55:1 | AAA | Lc -59.1 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DFEDEC
oklch(93.5% 0.015 191.8)
-
Step 200
200
#C4E0DE
oklch(88.6% 0.03 191.4)
-
Step 300
300
#99CCCA
oklch(80.9% 0.053 193.1)
-
Step 400
400 (this color)
#66BDBA
oklch(74.3% 0.084 192.6)
-
Step 500
500
#029E9B
oklch(63.2% 0.108 192.4)
-
Step 600
600
#008582
oklch(55.7% 0.096 192)
-
Step 700
700
#006F6D
oklch(49% 0.084 192.6)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#022D2C
oklch(26.9% 0.045 192.4)
#66BDBA 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) | #B4B5BA | 0.089 |
| Deuteranopia (no green cones) | #A5AABB | 0.084 |
| Tritanopia (no blue cones) | #38C1BC | 0.030 |
| Achromatopsia (no color) | #AFAFAF | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BDBA
#66BDBA
oklch(74.3% 0.084 192.6)
- #DC969D
#DC969D
oklch(74.4% 0.085 12.7)
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 #66BDBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.049
- Medium Turquoise #48D1CC ΔE 0.054
- Pale Teal #82CBB2 ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.058
- Muted Teal #90B494 ΔE 0.060
- Light Sea Green #20B2AA ΔE 0.060
- Seafoam Blue #78D1B6 ΔE 0.063
Use #66BDBA 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.