#66B2BB
Closest named color: Greyblue (#77A1B5). oklch(71.8% 0.076 205.4), rgb(102, 178, 187).
Aa
Black text reads best on this color (8.65:1).
About this color
#66B2BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.076 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.047 away. Black text reads best on it, at 8.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.65:1 |
| White text | 2.42:1 |
Values
| HEX | #66B2BB |
| RGB | rgb(102, 178, 187) |
| HSL | hsl(186, 38%, 57%) |
| OKLCH | oklch(71.8% 0.076 205.4) |
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 #66B2BB | 2.42:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #66B2BB | 8.65:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #66B2BB text on white | 2.42:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #66B2BB text on black | 8.65:1 | AAA | Lc -54.4 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C6DFE2
oklch(88.6% 0.027 205.4)
-
Step 300
300
#9DCACF
oklch(80.9% 0.048 204.7)
-
Step 400
400 (this color)
#66B2BB
oklch(71.8% 0.076 205.4)
-
Step 500
500
#299AA6
oklch(63.1% 0.098 205.6)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#024B52
oklch(37.7% 0.064 205.7)
-
Step 950
950
#082C30
oklch(27% 0.04 205.7)
#66B2BB 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) | #A7ACBC | 0.076 |
| Deuteranopia (no green cones) | #99A2BB | 0.069 |
| Tritanopia (no blue cones) | #3BB8B5 | 0.037 |
| Achromatopsia (no color) | #A6A6A6 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B2BB
#66B2BB
oklch(71.8% 0.076 205.4)
- #D0928B
#D0928B
oklch(71.9% 0.076 26.3)
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 #66B2BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.048
- Light Sea Green #20B2AA ΔE 0.053
- Topaz #13BBAF ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.056
- Cool Steel #97A7B3 ΔE 0.058
- Pewter #96A8A1 ΔE 0.060
Use #66B2BB 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.