#066E69
Closest named color: Dark Aquamarine (#017371). oklch(48.6% 0.083 189.2), rgb(6, 110, 105).
Aa
White text reads best on this color (6.10:1).
About this color
#066E69 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.083 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.017 away. White text reads best on it, at 6.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #066E69 |
| RGB | rgb(6, 110, 105) |
| HSL | hsl(177, 90%, 23%) |
| OKLCH | oklch(48.6% 0.083 189.2) |
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 #066E69 | 6.10:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #066E69 | 3.44:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #066E69 text on white | 6.10:1 | AA | Lc 80.0 | Fine for body text |
| #066E69 text on black | 3.44:1 | AA large text | Lc -21.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#C9DEDC
oklch(88.4% 0.023 189.8)
-
Step 300
300
#A4C9C6
oklch(80.8% 0.04 190.3)
-
Step 400
400
#70AEA9
oklch(70.7% 0.064 189.3)
-
Step 500
500
#459994
oklch(63% 0.082 190)
-
Step 600
600
#1D847E
oklch(55.7% 0.089 188.9)
-
Step 700
700 (this color)
#066E69
oklch(48.6% 0.083 189.2)
-
Step 800
800
#105B57
oklch(42.8% 0.069 189.4)
-
Step 900
900
#184B47
oklch(37.8% 0.054 187.9)
-
Step 950
950
#102C2A
oklch(27.1% 0.034 189.1)
#066E69 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) | #676769 | 0.088 |
| Deuteranopia (no green cones) | #5A5E6A | 0.082 |
| Tritanopia (no blue cones) | #00716C | 0.009 |
| Achromatopsia (no color) | #626262 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066E69
#066E69
oklch(48.6% 0.083 189.2)
- #874A55
#874A55
oklch(48.5% 0.083 9.1)
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 #066E69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.017
- Dark Aqua #05696B ΔE 0.018
- Deep Turquoise #017374 ΔE 0.020
- Dark Green Blue #1F6357 ΔE 0.037
- Bluegreen #017A79 ΔE 0.039
- Deep Aqua #08787F ΔE 0.041
- Petrol #005F6A ΔE 0.050
- Teal #008080 ΔE 0.059
Use #066E69 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.