#66BCAC
Closest named color: Topaz (#13BBAF). oklch(73.7% 0.087 180.3), rgb(102, 188, 172).
Aa
Black text reads best on this color (9.35:1).
About this color
#66BCAC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.087 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.043 away. Black text reads best on it, at 9.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.35:1 |
| White text | 2.24:1 |
Values
| HEX | #66BCAC |
| RGB | rgb(102, 188, 172) |
| HSL | hsl(169, 39%, 57%) |
| OKLCH | oklch(73.7% 0.087 180.3) |
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 #66BCAC | 2.24:1 | Fails | Lc -48.9 | Large or bold text, headings |
| Black text on #66BCAC | 9.35:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #66BCAC text on white | 2.24:1 | Fails | Lc 44.1 | Non-text elements, placeholder text |
| #66BCAC text on black | 9.35:1 | AAA | Lc -58.0 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#DFEDEA
oklch(93.5% 0.015 181.8)
-
Step 200
200
#C5E0DA
oklch(88.5% 0.03 180.7)
-
Step 300
300
#9ACDC2
oklch(80.9% 0.055 180.1)
-
Step 400
400 (this color)
#66BCAC
oklch(73.7% 0.087 180.3)
-
Step 500
500
#119F8C
oklch(63.1% 0.112 180.1)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#042E27
oklch(27.1% 0.046 178.8)
#66BCAC 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) | #B6B3AB | 0.093 |
| Deuteranopia (no green cones) | #A7A9AD | 0.087 |
| Tritanopia (no blue cones) | #42BFB7 | 0.026 |
| Achromatopsia (no color) | #ADADAD | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BCAC
#66BCAC
oklch(73.7% 0.087 180.3)
- #D893A7
#D893A7
oklch(73.7% 0.087 0.5)
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 #66BCAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.043
- Muted Teal #90B494 ΔE 0.049
- Medium Aquamarine #66CDAA ΔE 0.050
- Greeny Blue #42B395 ΔE 0.050
- Pale Teal #82CBB2 ΔE 0.053
- Dark Sea Green #8FBC8F ΔE 0.053
- Light Sea Green #20B2AA ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.061
Use #66BCAC 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.