#66BCB2
Closest named color: Topaz (#13BBAF). oklch(73.8% 0.085 185.8), rgb(102, 188, 178).
Aa
Black text reads best on this color (9.40:1).
About this color
#66BCB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.085 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.045 away. Black text reads best on it, at 9.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.40:1 |
| White text | 2.23:1 |
Values
| HEX | #66BCB2 |
| RGB | rgb(102, 188, 178) |
| HSL | hsl(173, 39%, 57%) |
| OKLCH | oklch(73.8% 0.085 185.8) |
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 #66BCB2 | 2.23:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #66BCB2 | 9.40:1 | AAA | Lc 60.1 | Content text, not long reading |
| #66BCB2 text on white | 2.23:1 | Fails | Lc 43.9 | Non-text elements, placeholder text |
| #66BCB2 text on black | 9.40:1 | AAA | Lc -58.3 | 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
#C4E0DC
oklch(88.5% 0.03 186.2)
-
Step 300
300
#9ACCC5
oklch(80.8% 0.053 185.6)
-
Step 400
400 (this color)
#66BCB2
oklch(73.8% 0.085 185.8)
-
Step 500
500
#0E9E93
oklch(63% 0.108 186)
-
Step 600
600
#00857C
oklch(55.5% 0.097 186.5)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#005C55
oklch(42.7% 0.075 185.9)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#032D2A
oklch(26.9% 0.044 187.7)
#66BCB2 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) | #B4B4B2 | 0.090 |
| Deuteranopia (no green cones) | #A6A9B3 | 0.086 |
| Tritanopia (no blue cones) | #3EBFB9 | 0.027 |
| Achromatopsia (no color) | #ADADAD | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BCB2
#66BCB2
oklch(73.8% 0.085 185.8)
- #D994A2
#D994A2
oklch(73.8% 0.085 6)
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 #66BCB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.045
- Muted Teal #90B494 ΔE 0.053
- Pale Teal #82CBB2 ΔE 0.053
- Medium Aquamarine #66CDAA ΔE 0.054
- Light Sea Green #20B2AA ΔE 0.056
- Greeny Blue #42B395 ΔE 0.056
- Medium Turquoise #48D1CC ΔE 0.058
- Dark Sea Green #8FBC8F ΔE 0.059
Use #66BCB2 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.