#66AABE
Closest named color: Greyblue (#77A1B5). oklch(70% 0.075 218.7), rgb(102, 170, 190).
Aa
Black text reads best on this color (8.05:1).
About this color
#66AABE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.075 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.028 away. Black text reads best on it, at 8.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.05:1 |
| White text | 2.60:1 |
Values
| HEX | #66AABE |
| RGB | rgb(102, 170, 190) |
| HSL | hsl(194, 40%, 57%) |
| OKLCH | oklch(70% 0.075 218.7) |
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 #66AABE | 2.60:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #66AABE | 8.05:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #66AABE text on white | 2.60:1 | Fails | Lc 50.8 | Large or bold text, headings |
| #66AABE text on black | 8.05:1 | AAA | Lc -51.2 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#A0C8D5
oklch(80.8% 0.046 219.6)
-
Step 400
400 (this color)
#66AABE
oklch(70% 0.075 218.7)
-
Step 500
500
#3697B0
oklch(63.1% 0.096 218.4)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#0D4958
oklch(37.6% 0.063 219.2)
-
Step 950
950
#0B2B33
oklch(27% 0.039 217.4)
#66AABE 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) | #9DA6BF | 0.064 |
| Deuteranopia (no green cones) | #909CBE | 0.059 |
| Tritanopia (no blue cones) | #3BB1B0 | 0.047 |
| Achromatopsia (no color) | #A0A0A0 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AABE
#66AABE
oklch(70% 0.075 218.7)
- #C88F7C
#C88F7C
oklch(70.1% 0.075 39.2)
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 #66AABE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.028
- Bluegrey #85A3B2 ΔE 0.037
- Bluey Grey #89A0B0 ΔE 0.044
- Turquoise Blue #06B1C4 ΔE 0.048
- Cadet Blue #5F9EA0 ΔE 0.050
- Cool Steel #97A7B3 ΔE 0.056
- Cool Gray #8D99AE ΔE 0.059
- Cool Grey #95A3A6 ΔE 0.059
Use #66AABE 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.