#066638
Closest named color: Spruce (#0A5F38). oklch(44.9% 0.11 154.5), rgb(6, 102, 56).
Aa
White text reads best on this color (7.08:1).
About this color
#066638 is a dark, moderately saturated green. In OKLCH its lightness is 45%, its chroma 0.110 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.023 away. White text reads best on it, at 7.08:1.
| Hue family | Greens |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #066638 |
| RGB | rgb(6, 102, 56) |
| HSL | hsl(151, 89%, 21%) |
| OKLCH | oklch(44.9% 0.11 154.5) |
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 #066638 | 7.08:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #066638 | 2.96:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #066638 text on white | 7.08:1 | AAA | Lc 84.0 | Fine for body text |
| #066638 text on black | 2.96:1 | Fails | Lc -17.9 | 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
#F1F7F3
oklch(97.1% 0.008 157.1)
-
Step 100
100
#E1EEE4
oklch(93.7% 0.019 152.8)
-
Step 200
200
#C8E0CF
oklch(88.4% 0.034 154.8)
-
Step 300
300
#A1CDAE
oklch(80.8% 0.064 154.1)
-
Step 400
400
#6AB484
oklch(70.8% 0.103 154.4)
-
Step 500
500
#38A065
oklch(63.1% 0.131 154.8)
-
Step 600
600
#008A4C
oklch(55.6% 0.139 154.3)
-
Step 700
700
#00743F
oklch(49.1% 0.123 154.3)
-
Step 800
800 (this color)
#066638
oklch(44.9% 0.11 154.5)
-
Step 900
900
#0F4E2C
oklch(37.6% 0.085 154.5)
-
Step 950
950
#0C2E1A
oklch(27% 0.054 154.4)
#066638 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) | #665D35 | 0.097 |
| Deuteranopia (no green cones) | #5C553B | 0.096 |
| Tritanopia (no blue cones) | #00655B | 0.055 |
| Achromatopsia (no color) | #585858 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066638
#066638
oklch(44.9% 0.11 154.5)
- #793B6D
#793B6D
oklch(45% 0.109 335)
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 #066638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.023
- Pine #2B5D34 ΔE 0.031
- Dark Green #006400 ΔE 0.049
- Deep Green #02590F ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.055
- Camouflage Green #4B6113 ΔE 0.056
- Army Green #4B5D16 ΔE 0.058
- Camo Green #526525 ΔE 0.062
Use #066638 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.