#66BCAF
Closest named color: Topaz (#13BBAF). oklch(73.7% 0.086 183), rgb(102, 188, 175).
Aa
Black text reads best on this color (9.37:1).
About this color
#66BCAF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.086 and its hue 183°. 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 9.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.37:1 |
| White text | 2.23:1 |
Values
| HEX | #66BCAF |
| RGB | rgb(102, 188, 175) |
| HSL | hsl(171, 39%, 57%) |
| OKLCH | oklch(73.7% 0.086 183) |
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 #66BCAF | 2.23:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #66BCAF | 9.37:1 | AAA | Lc 60.0 | Large or bold text, headings |
| #66BCAF text on white | 2.23:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #66BCAF text on black | 9.37:1 | AAA | Lc -58.2 | 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
#C5E0DB
oklch(88.5% 0.029 183.3)
-
Step 300
300
#9ACCC4
oklch(80.8% 0.053 184.1)
-
Step 400
400 (this color)
#66BCAF
oklch(73.7% 0.086 183)
-
Step 500
500
#109F90
oklch(63.2% 0.11 183)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007065
oklch(49% 0.087 183.1)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#032E28
oklch(27.1% 0.047 181.1)
#66BCAF 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) | #B5B3AF | 0.092 |
| Deuteranopia (no green cones) | #A7A9B0 | 0.087 |
| Tritanopia (no blue cones) | #40BFB8 | 0.026 |
| Achromatopsia (no color) | #ADADAD | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BCAF
#66BCAF
oklch(73.7% 0.086 183)
- #D893A5
#D893A5
oklch(73.6% 0.086 2.3)
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 #66BCAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.044
- Muted Teal #90B494 ΔE 0.051
- Medium Aquamarine #66CDAA ΔE 0.052
- Pale Teal #82CBB2 ΔE 0.053
- Greeny Blue #42B395 ΔE 0.053
- Light Sea Green #20B2AA ΔE 0.055
- Dark Sea Green #8FBC8F ΔE 0.056
- Medium Turquoise #48D1CC ΔE 0.060
Use #66BCAF 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.