#066451
Closest named color: Dark Green Blue (#1F6357). oklch(45% 0.084 173.4), rgb(6, 100, 81).
Aa
White text reads best on this color (7.12:1).
About this color
#066451 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 45%, its chroma 0.084 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.016 away. White text reads best on it, at 7.12:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #066451 |
| RGB | rgb(6, 100, 81) |
| HSL | hsl(168, 89%, 21%) |
| OKLCH | oklch(45% 0.084 173.4) |
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 #066451 | 7.12:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #066451 | 2.94:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #066451 text on white | 7.12:1 | AAA | Lc 84.2 | Fine for body text |
| #066451 text on black | 2.94:1 | Fails | Lc -17.7 | 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 800.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C8DFD7
oklch(88.4% 0.027 172.8)
-
Step 300
300
#A1CBBE
oklch(80.8% 0.048 174.2)
-
Step 400
400
#6AB19C
oklch(70.7% 0.079 173)
-
Step 500
500
#389D84
oklch(63.1% 0.101 173.5)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800 (this color)
#066451
oklch(45% 0.084 173.4)
-
Step 900
900
#0F4D3E
oklch(37.8% 0.066 172.5)
-
Step 950
950
#0C2D25
oklch(27% 0.041 174.3)
#066451 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) | #605D50 | 0.087 |
| Deuteranopia (no green cones) | #555552 | 0.082 |
| Tritanopia (no blue cones) | #00655E | 0.020 |
| Achromatopsia (no color) | #585858 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066451
#066451
oklch(45% 0.084 173.4)
- #794059
#794059
oklch(45% 0.085 353.3)
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 #066451, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.016
- Spruce #0A5F38 ΔE 0.037
- Dark Aqua #05696B ΔE 0.041
- Pine #2B5D34 ΔE 0.042
- Petrol #005F6A ΔE 0.049
- Deep Teal #00555A ΔE 0.057
- Dark Blue Green #005249 ΔE 0.059
- Dark Aquamarine #017371 ΔE 0.060
Use #066451 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.