#66BFAE
Closest named color: Medium Aquamarine (#66CDAA). oklch(74.4% 0.09 179.8), rgb(102, 191, 174).
Aa
Black text reads best on this color (9.62:1).
About this color
#66BFAE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.090 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.043 away. Black text reads best on it, at 9.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 9.62:1 |
| White text | 2.18:1 |
Values
| HEX | #66BFAE |
| RGB | rgb(102, 191, 174) |
| HSL | hsl(169, 41%, 57%) |
| OKLCH | oklch(74.4% 0.09 179.8) |
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 #66BFAE | 2.18:1 | Fails | Lc -47.5 | Large or bold text, headings |
| Black text on #66BFAE | 9.62:1 | AAA | Lc 61.2 | Content text, not long reading |
| #66BFAE text on white | 2.18:1 | Fails | Lc 42.7 | Non-text elements, placeholder text |
| #66BFAE text on black | 9.62:1 | AAA | Lc -59.5 | 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
#C4E0DA
oklch(88.4% 0.031 181.2)
-
Step 300
300
#99CDC2
oklch(80.9% 0.056 180.3)
-
Step 400
400 (this color)
#66BFAE
oklch(74.4% 0.09 179.8)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008675
oklch(55.5% 0.101 179.7)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#022E27
oklch(27% 0.048 179.1)
#66BFAE 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) | #B8B6AD | 0.095 |
| Deuteranopia (no green cones) | #AAABAF | 0.091 |
| Tritanopia (no blue cones) | #40C2BA | 0.027 |
| Achromatopsia (no color) | #B0B0B0 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BFAE
#66BFAE
oklch(74.4% 0.09 179.8)
- #DC94AA
#DC94AA
oklch(74.4% 0.091 359.7)
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 #66BFAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.043
- Pale Teal #82CBB2 ΔE 0.046
- Topaz #13BBAF ΔE 0.046
- Muted Teal #90B494 ΔE 0.051
- Dark Sea Green #8FBC8F ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.054
- Seafoam Blue #78D1B6 ΔE 0.054
- Greeny Blue #42B395 ΔE 0.056
Use #66BFAE 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.