#666C3D
Closest named color: Dark Moss Green (#606C38). oklch(51.4% 0.068 114.8), rgb(102, 108, 61).
Aa
White text reads best on this color (5.55:1).
About this color
#666C3D is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.068 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.012 away. White text reads best on it, at 5.55:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.77:1 |
| White text | 5.55:1 |
Values
| HEX | #666C3D |
| RGB | rgb(102, 108, 61) |
| HSL | hsl(68, 28%, 33%) |
| OKLCH | oklch(51.4% 0.068 114.8) |
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 #666C3D | 5.55:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #666C3D | 3.77:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #666C3D text on white | 5.55:1 | AA | Lc 77.8 | Fine for body text |
| #666C3D text on black | 3.77:1 | AA large text | Lc -24.0 | 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
#F5F6F2
oklch(97.1% 0.005 117.9)
-
Step 100
100
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D8DBCD
oklch(88.5% 0.019 116.6)
-
Step 300
300
#C0C3AC
oklch(80.9% 0.032 113.1)
-
Step 400
400
#9FA57F
oklch(70.7% 0.053 115.1)
-
Step 500
500
#888F5F
oklch(63.2% 0.068 115.1)
-
Step 600
600
#727845
oklch(55.5% 0.073 114.3)
-
Step 700
700 (this color)
#666C3D
oklch(51.4% 0.068 114.8)
-
Step 800
800
#4E532E
oklch(42.8% 0.056 115.1)
-
Step 900
900
#414429
oklch(37.6% 0.043 113.6)
-
Step 950
950
#262818
oklch(27% 0.028 114.1)
#666C3D 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) | #726839 | 0.020 |
| Deuteranopia (no green cones) | #72693F | 0.021 |
| Tritanopia (no blue cones) | #6B6761 | 0.060 |
| Achromatopsia (no color) | #686868 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666C3D
#666C3D
oklch(51.4% 0.068 114.8)
- #6A5F8B
#6A5F8B
oklch(51.4% 0.07 295.3)
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 #666C3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.012
- Muddy Green #657432 ΔE 0.031
- Dark Olive Green #556B2F ΔE 0.032
- Brown Green #706C11 ΔE 0.039
- Browny Green #6F6C0A ΔE 0.041
- Camo Green #526525 ΔE 0.047
- Greeny Brown #696006 ΔE 0.047
- Military Green #667C3E ΔE 0.048
Use #666C3D 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.