#66B2CF
Closest named color: Greyblue (#77A1B5). oklch(72.5% 0.086 224.8), rgb(102, 178, 207).
Aa
Black text reads best on this color (8.83:1).
About this color
#66B2CF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.086 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.051 away. Black text reads best on it, at 8.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.83:1 |
| White text | 2.37:1 |
Values
| HEX | #66B2CF |
| RGB | rgb(102, 178, 207) |
| HSL | hsl(197, 52%, 61%) |
| OKLCH | oklch(72.5% 0.086 224.8) |
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 #66B2CF | 2.37:1 | Fails | Lc -51.7 | Large or bold text, headings |
| Black text on #66B2CF | 8.83:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #66B2CF text on white | 2.37:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #66B2CF text on black | 8.83:1 | AAA | Lc -55.3 | 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
#F1F7F9
oklch(97.2% 0.007 219.6)
-
Step 100
100
#DFECF2
oklch(93.5% 0.016 227)
-
Step 200
200
#C5DEE8
oklch(88.5% 0.03 223.8)
-
Step 300
300
#9CC9DB
oklch(81% 0.054 224.4)
-
Step 400
400 (this color)
#66B2CF
oklch(72.5% 0.086 224.8)
-
Step 500
500
#2497BB
oklch(63.1% 0.11 224.5)
-
Step 600
600
#007FA1
oklch(55.5% 0.105 225)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950
#062B37
oklch(27% 0.046 224.3)
#66B2CF 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) | #A2AFD1 | 0.068 |
| Deuteranopia (no green cones) | #93A3CF | 0.061 |
| Tritanopia (no blue cones) | #28BBBB | 0.060 |
| Achromatopsia (no color) | #A8A8A8 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B2CF
#66B2CF
oklch(72.5% 0.086 224.8)
- #D49579
#D49579
oklch(72.5% 0.086 44.9)
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 #66B2CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.054
- Bluey Grey #89A0B0 ΔE 0.062
- Cool Steel #97A7B3 ΔE 0.063
- Vivid Sky Blue #4CC9F0 ΔE 0.067
- Light Grey Blue #9DBCD4 ΔE 0.069
- Light Cornflower Blue #98C1D9 ΔE 0.072
Use #66B2CF 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.