#66BCBE
Closest named color: Topaz (#13BBAF). oklch(74.2% 0.083 197.5), rgb(102, 188, 190).
Aa
Black text reads best on this color (9.50:1).
About this color
#66BCBE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.083 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.052 away. Black text reads best on it, at 9.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.50:1 |
| White text | 2.21:1 |
Values
| HEX | #66BCBE |
| RGB | rgb(102, 188, 190) |
| HSL | hsl(181, 40%, 57%) |
| OKLCH | oklch(74.2% 0.083 197.5) |
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 #66BCBE | 2.21:1 | Fails | Lc -48.1 | Large or bold text, headings |
| Black text on #66BCBE | 9.50:1 | AAA | Lc 60.6 | Content text, not long reading |
| #66BCBE text on white | 2.21:1 | Fails | Lc 43.4 | Non-text elements, placeholder text |
| #66BCBE text on black | 9.50:1 | AAA | Lc -58.8 | 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
#DFEDED
oklch(93.6% 0.015 196.9)
-
Step 200
200
#C4DFE0
oklch(88.4% 0.029 199.4)
-
Step 300
300
#99CCCC
oklch(81% 0.053 196.2)
-
Step 400
400 (this color)
#66BCBE
oklch(74.2% 0.083 197.5)
-
Step 500
500
#069DA0
oklch(63.2% 0.107 197.2)
-
Step 600
600
#008487
oklch(55.6% 0.095 197.6)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#032D2E
oklch(27.1% 0.044 197.3)
#66BCBE 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) | #B2B5BE | 0.086 |
| Deuteranopia (no green cones) | #A3AABF | 0.080 |
| Tritanopia (no blue cones) | #35C1BC | 0.034 |
| Achromatopsia (no color) | #AEAEAE | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BCBE
#66BCBE
oklch(74.2% 0.083 197.5)
- #DB9698
#DB9698
oklch(74.2% 0.083 17.4)
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 #66BCBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.056
- Pale Teal #82CBB2 ΔE 0.059
- Light Sea Green #20B2AA ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.061
- Muted Teal #90B494 ΔE 0.064
- Medium Aquamarine #66CDAA ΔE 0.064
Use #66BCBE 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.