#66BDAB
Closest named color: Topaz (#13BBAF). oklch(73.9% 0.089 178.7), rgb(102, 189, 171).
Aa
Black text reads best on this color (9.43:1).
About this color
#66BDAB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.089 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.044 away. Black text reads best on it, at 9.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.43:1 |
| White text | 2.22:1 |
Values
| HEX | #66BDAB |
| RGB | rgb(102, 189, 171) |
| HSL | hsl(168, 40%, 57%) |
| OKLCH | oklch(73.9% 0.089 178.7) |
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 #66BDAB | 2.22:1 | Fails | Lc -48.5 | Large or bold text, headings |
| Black text on #66BDAB | 9.43:1 | AAA | Lc 60.3 | Content text, not long reading |
| #66BDAB text on white | 2.22:1 | Fails | Lc 43.7 | Non-text elements, placeholder text |
| #66BDAB text on black | 9.43:1 | AAA | Lc -58.5 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DFEEEA
oklch(93.7% 0.017 178.3)
-
Step 200
200
#C4E0D9
oklch(88.4% 0.031 178.8)
-
Step 300
300
#9ACDC1
oklch(80.9% 0.056 178.7)
-
Step 400
400 (this color)
#66BDAB
oklch(73.9% 0.089 178.7)
-
Step 500
500
#0D9F8A
oklch(63% 0.113 178.7)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#032E27
oklch(27.1% 0.047 179)
#66BDAB 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) | #B7B4AA | 0.094 |
| Deuteranopia (no green cones) | #A8A9AC | 0.089 |
| Tritanopia (no blue cones) | #42BFB7 | 0.027 |
| Achromatopsia (no color) | #AEAEAE | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BDAB
#66BDAB
oklch(73.9% 0.089 178.7)
- #D993A9
#D993A9
oklch(73.9% 0.089 359.1)
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 #66BDAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.044
- Medium Aquamarine #66CDAA ΔE 0.047
- Muted Teal #90B494 ΔE 0.048
- Pale Teal #82CBB2 ΔE 0.050
- Greeny Blue #42B395 ΔE 0.051
- Dark Sea Green #8FBC8F ΔE 0.051
- Light Sea Green #20B2AA ΔE 0.057
- Seafoam Blue #78D1B6 ΔE 0.060
Use #66BDAB 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.