#66A3BD
Closest named color: Greyblue (#77A1B5). oklch(68.4% 0.074 227), rgb(102, 163, 189).
Aa
Black text reads best on this color (7.53:1).
About this color
#66A3BD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.074 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.020 away. Black text reads best on it, at 7.53:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #66A3BD |
| RGB | rgb(102, 163, 189) |
| HSL | hsl(198, 40%, 57%) |
| OKLCH | oklch(68.4% 0.074 227) |
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 #66A3BD | 2.78:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #66A3BD | 7.53:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #66A3BD text on white | 2.78:1 | Fails | Lc 53.6 | Large or bold text, headings |
| #66A3BD text on black | 7.53:1 | AAA | Lc -48.3 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A2C7D8
oklch(80.8% 0.046 227.5)
-
Step 400
400 (this color)
#66A3BD
oklch(68.4% 0.074 227)
-
Step 500
500
#4195B6
oklch(63.2% 0.094 227.1)
-
Step 600
600
#147FA2
oklch(55.7% 0.103 226.9)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#0A5770
oklch(42.7% 0.079 226.8)
-
Step 900
900
#15485B
oklch(37.7% 0.062 227)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#66A3BD 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) | #95A0BE | 0.056 |
| Deuteranopia (no green cones) | #8897BD | 0.049 |
| Tritanopia (no blue cones) | #3EABAB | 0.052 |
| Achromatopsia (no color) | #9B9B9B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A3BD
#66A3BD
oklch(68.4% 0.074 227)
- #C08C72
#C08C72
oklch(68.4% 0.074 47.6)
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 #66A3BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.020
- Bluegrey #85A3B2 ΔE 0.037
- Bluey Grey #89A0B0 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.044
- Cool Gray #8D99AE ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.056
- Silver Lake Blue #778DA9 ΔE 0.061
- Cool Steel #97A7B3 ΔE 0.061
Use #66A3BD 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.