#066057
Closest named color: Dark Green Blue (#1F6357). oklch(44% 0.076 183.7), rgb(6, 96, 87).
Aa
White text reads best on this color (7.45:1).
About this color
#066057 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 44%, its chroma 0.076 and its hue 184°. 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 7.45:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #066057 |
| RGB | rgb(6, 96, 87) |
| HSL | hsl(174, 88%, 20%) |
| OKLCH | oklch(44% 0.076 183.7) |
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 #066057 | 7.45:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #066057 | 2.81:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #066057 text on white | 7.45:1 | AAA | Lc 85.4 | Fine for body text |
| #066057 text on black | 2.81:1 | Fails | Lc -16.6 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C8DFDB
oklch(88.5% 0.025 184.2)
-
Step 300
300
#A1CBC3
oklch(81% 0.046 182.2)
-
Step 400
400
#6BAFA5
oklch(70.6% 0.071 183.9)
-
Step 500
500
#3B9B8F
oklch(63% 0.091 183.8)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800 (this color)
#066057
oklch(44% 0.076 183.7)
-
Step 900
900
#114C45
oklch(37.8% 0.06 183.5)
-
Step 950
950
#0D2C28
oklch(26.9% 0.037 183.8)
#066057 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) | #5B5A57 | 0.081 |
| Deuteranopia (no green cones) | #505258 | 0.077 |
| Tritanopia (no blue cones) | #00625D | 0.010 |
| Achromatopsia (no color) | #555555 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066057
#066057
oklch(44% 0.076 183.7)
- #75404E
#75404E
oklch(44.1% 0.075 3.7)
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 #066057, 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
- Petrol #005F6A ΔE 0.033
- Dark Aqua #05696B ΔE 0.038
- Deep Teal #00555A ΔE 0.039
- Dark Blue Green #005249 ΔE 0.047
- Spruce #0A5F38 ΔE 0.048
- Pine #2B5D34 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #066057 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.