#066A6F
Closest named color: Dark Aqua (#05696B). oklch(47.7% 0.08 200.6), rgb(6, 106, 111).
Aa
White text reads best on this color (6.36:1).
About this color
#066A6F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 48%, its chroma 0.080 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.007 away. White text reads best on it, at 6.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.29:1 |
| White text | 6.36:1 |
Values
| HEX | #066A6F |
| RGB | rgb(6, 106, 111) |
| HSL | hsl(183, 90%, 23%) |
| OKLCH | oklch(47.7% 0.08 200.6) |
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 #066A6F | 6.36:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #066A6F | 3.29:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #066A6F text on white | 6.36:1 | AA | Lc 81.2 | Fine for body text |
| #066A6F text on black | 3.29:1 | AA large text | Lc -20.7 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADEDF
oklch(88.6% 0.021 200.4)
-
Step 300
300
#A4C9CB
oklch(81% 0.039 200.5)
-
Step 400
400
#71ADB0
oklch(70.8% 0.062 199.9)
-
Step 500
500
#47989D
oklch(63.1% 0.079 200.8)
-
Step 600
600
#218288
oklch(55.6% 0.086 201.2)
-
Step 700
700 (this color)
#066A6F
oklch(47.7% 0.08 200.6)
-
Step 800
800
#135A5E
oklch(42.8% 0.066 200.7)
-
Step 900
900
#194A4D
oklch(37.8% 0.052 200.8)
-
Step 950
950
#112B2D
oklch(27% 0.032 202.1)
#066A6F 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) | #61656F | 0.081 |
| Deuteranopia (no green cones) | #545B6F | 0.075 |
| Tritanopia (no blue cones) | #006F6B | 0.019 |
| Achromatopsia (no color) | #5F5F5F | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066A6F
#066A6F
oklch(47.7% 0.08 200.6)
- #844A49
#844A49
oklch(47.8% 0.079 21.5)
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 #066A6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.007
- Deep Turquoise #017374 ΔE 0.028
- Dark Aquamarine #017371 ΔE 0.028
- Petrol #005F6A ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.038
- Deep Aqua #08787F ΔE 0.045
- Bluegreen #017A79 ΔE 0.049
- Slate #516572 ΔE 0.060
Use #066A6F 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.