#066B7B
Closest named color: Dark Aqua (#05696B). oklch(48.5% 0.083 212.8), rgb(6, 107, 123).
Aa
White text reads best on this color (6.18:1).
About this color
#066B7B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.083 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.026 away. White text reads best on it, at 6.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #066B7B |
| RGB | rgb(6, 107, 123) |
| HSL | hsl(188, 91%, 25%) |
| OKLCH | oklch(48.5% 0.083 212.8) |
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 #066B7B | 6.18:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #066B7B | 3.39:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #066B7B text on white | 6.18:1 | AA | Lc 80.3 | Fine for body text |
| #066B7B text on black | 3.39:1 | AA large text | Lc -21.5 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A4C8D0
oklch(80.9% 0.04 212.7)
-
Step 400
400
#70ACB9
oklch(70.8% 0.065 212.8)
-
Step 500
500
#4597A7
oklch(63.2% 0.083 212.3)
-
Step 600
600
#1D8192
oklch(55.7% 0.09 212.1)
-
Step 700
700 (this color)
#066B7B
oklch(48.5% 0.083 212.8)
-
Step 800
800
#115965
oklch(42.8% 0.069 211.8)
-
Step 900
900
#184953
oklch(37.7% 0.054 213.6)
-
Step 950
950
#102B30
oklch(27% 0.034 211.3)
#066B7B 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) | #5F677C | 0.076 |
| Deuteranopia (no green cones) | #515D7B | 0.068 |
| Tritanopia (no blue cones) | #007170 | 0.030 |
| Achromatopsia (no color) | #616161 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066B7B
#066B7B
oklch(48.5% 0.083 212.8)
- #884C40
#884C40
oklch(48.5% 0.084 32.3)
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 #066B7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.026
- Deep Turquoise #017374 ΔE 0.031
- Dark Aquamarine #017371 ΔE 0.034
- Deep Aqua #08787F ΔE 0.040
- Petrol #005F6A ΔE 0.042
- Sea Blue #047495 ΔE 0.045
- Peacock Blue #016795 ΔE 0.048
- Bluegreen #017A79 ΔE 0.049
Use #066B7B 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.