#666C3F
Closest named color: Dark Moss Green (#606C38). oklch(51.5% 0.066 115), rgb(102, 108, 63).
Aa
White text reads best on this color (5.55:1).
About this color
#666C3F is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.066 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 0.014 away. White text reads best on it, at 5.55:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.066) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #666C3F |
| RGB | rgb(102, 108, 63) |
| HSL | hsl(68, 26%, 34%) |
| OKLCH | oklch(51.5% 0.066 115) |
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 #666C3F | 5.55:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #666C3F | 3.78:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #666C3F text on white | 5.55:1 | AA | Lc 77.7 | Fine for body text |
| #666C3F text on black | 3.78:1 | 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D8DBCE
oklch(88.6% 0.018 117.3)
-
Step 300
300
#BFC3AC
oklch(80.8% 0.032 115.1)
-
Step 400
400
#9FA581
oklch(70.7% 0.051 115.4)
-
Step 500
500
#888E61
oklch(63% 0.064 114.4)
-
Step 600
600
#727847
oklch(55.5% 0.07 114.4)
-
Step 700
700 (this color)
#666C3F
oklch(51.5% 0.066 115)
-
Step 800
800
#4E532F
oklch(42.8% 0.055 115.2)
-
Step 900
900
#41442A
oklch(37.6% 0.042 113.8)
-
Step 950
950
#262819
oklch(27% 0.026 114.4)
#666C3F 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) | #72683C | 0.020 |
| Deuteranopia (no green cones) | #716941 | 0.020 |
| Tritanopia (no blue cones) | #6B6761 | 0.058 |
| Achromatopsia (no color) | #686868 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666C3F
#666C3F
oklch(51.5% 0.066 115)
- #6A6089
#6A6089
oklch(51.5% 0.065 295.2)
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 #666C3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.014
- Muddy Green #657432 ΔE 0.033
- Dark Olive Green #556B2F ΔE 0.034
- Brown Green #706C11 ΔE 0.041
- Browny Green #6F6C0A ΔE 0.044
- Camo Green #526525 ΔE 0.048
- Dirt Brown #836539 ΔE 0.048
- Military Green #667C3E ΔE 0.049
Use #666C3F 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.