#66ACBC
Closest named color: Greyblue (#77A1B5). oklch(70.4% 0.074 214), rgb(102, 172, 188).
Aa
Black text reads best on this color (8.19:1).
About this color
#66ACBC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.074 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.032 away. Black text reads best on it, at 8.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.19:1 |
| White text | 2.56:1 |
Values
| HEX | #66ACBC |
| RGB | rgb(102, 172, 188) |
| HSL | hsl(191, 39%, 57%) |
| OKLCH | oklch(70.4% 0.074 214) |
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 #66ACBC | 2.56:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #66ACBC | 8.19:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #66ACBC text on white | 2.56:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #66ACBC text on black | 8.19:1 | AAA | Lc -51.9 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECEF
oklch(93.5% 0.013 214.4)
-
Step 200
200
#C7DEE4
oklch(88.5% 0.026 215.2)
-
Step 300
300
#9FC9D3
oklch(80.9% 0.046 213.9)
-
Step 400
400 (this color)
#66ACBC
oklch(70.4% 0.074 214)
-
Step 500
500
#3498AC
oklch(63.1% 0.094 213.7)
-
Step 600
600
#008196
oklch(55.5% 0.098 214.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#0B4A56
oklch(37.8% 0.062 214.3)
-
Step 950
950
#0B2B32
oklch(26.9% 0.039 214.8)
#66ACBC 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) | #A0A8BD | 0.068 |
| Deuteranopia (no green cones) | #929DBC | 0.062 |
| Tritanopia (no blue cones) | #3CB2B1 | 0.042 |
| Achromatopsia (no color) | #A2A2A2 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ACBC
#66ACBC
oklch(70.4% 0.074 214)
- #C98F81
#C98F81
oklch(70.3% 0.074 34.1)
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 #66ACBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.038
- Bluey Grey #89A0B0 ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.047
- Cadet Blue #5F9EA0 ΔE 0.051
- Cool Steel #97A7B3 ΔE 0.055
- Cool Grey #95A3A6 ΔE 0.058
- Light Sea Green #20B2AA ΔE 0.058
Use #66ACBC 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.