#066A64
Closest named color: Dark Aqua (#05696B). oklch(47.3% 0.081 187.9), rgb(6, 106, 100).
Aa
White text reads best on this color (6.45:1).
About this color
#066A64 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.081 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.013 away. White text reads best on it, at 6.45:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #066A64 |
| RGB | rgb(6, 106, 100) |
| HSL | hsl(176, 89%, 22%) |
| OKLCH | oklch(47.3% 0.081 187.9) |
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 #066A64 | 6.45:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #066A64 | 3.25:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #066A64 text on white | 6.45:1 | AA | Lc 81.6 | Fine for body text |
| #066A64 text on black | 3.25:1 | AA large text | Lc -20.3 | 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
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A5C9C5
oklch(80.9% 0.039 188.1)
-
Step 400
400
#72AEA8
oklch(70.8% 0.063 187.9)
-
Step 500
500
#489992
oklch(63% 0.08 187.8)
-
Step 600
600
#23847D
oklch(55.8% 0.087 187.8)
-
Step 700
700 (this color)
#066A64
oklch(47.3% 0.081 187.9)
-
Step 800
800
#155B56
oklch(42.8% 0.067 187.9)
-
Step 900
900
#1A4A47
oklch(37.6% 0.052 189.5)
-
Step 950
950
#112C29
oklch(27.1% 0.034 185.9)
#066A64 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) | #636464 | 0.085 |
| Deuteranopia (no green cones) | #575B65 | 0.080 |
| Tritanopia (no blue cones) | #006D68 | 0.010 |
| Achromatopsia (no color) | #5E5E5E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066A64
#066A64
oklch(47.3% 0.081 187.9)
- #824753
#824753
oklch(47.3% 0.081 7.6)
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 #066A64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.013
- Dark Green Blue #1F6357 ΔE 0.025
- Dark Aquamarine #017371 ΔE 0.030
- Deep Turquoise #017374 ΔE 0.033
- Petrol #005F6A ΔE 0.040
- Bluegreen #017A79 ΔE 0.053
- Deep Aqua #08787F ΔE 0.054
- Deep Teal #00555A ΔE 0.067
Use #066A64 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.