#666D2C
Closest named color: Dark Moss Green (#606C38). oklch(51.4% 0.089 114.7), rgb(102, 109, 44).
Aa
White text reads best on this color (5.54:1).
About this color
#666D2C is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.089 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 0.016 away. White text reads best on it, at 5.54:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #666D2C |
| RGB | rgb(102, 109, 44) |
| HSL | hsl(66, 42%, 30%) |
| OKLCH | oklch(51.4% 0.089 114.7) |
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 #666D2C | 5.54:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #666D2C | 3.78:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #666D2C text on white | 5.54:1 | AA | Lc 77.6 | Fine for body text |
| #666D2C text on black | 3.78:1 | AA large text | Lc -24.1 | 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
#E9EBE2
oklch(93.6% 0.012 116.8)
-
Step 200
200
#D8DBCA
oklch(88.4% 0.023 115)
-
Step 300
300
#BFC4A5
oklch(80.8% 0.043 114.8)
-
Step 400
400
#9FA674
oklch(70.7% 0.069 114.7)
-
Step 500
500
#889050
oklch(63.2% 0.088 114.8)
-
Step 600
600
#727A32
oklch(55.7% 0.096 114.9)
-
Step 700
700 (this color)
#666D2C
oklch(51.4% 0.089 114.7)
-
Step 800
800
#4E5320
oklch(42.6% 0.073 114.2)
-
Step 900
900
#414520
oklch(37.7% 0.057 114.2)
-
Step 950
950
#262913
oklch(27.1% 0.037 115.3)
#666D2C 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) | #746825 | 0.024 |
| Deuteranopia (no green cones) | #746930 | 0.026 |
| Tritanopia (no blue cones) | #6C675F | 0.078 |
| Achromatopsia (no color) | #686868 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666D2C
#666D2C
oklch(51.4% 0.089 114.7)
- #6B5D95
#6B5D95
oklch(51.5% 0.088 294.6)
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 #666D2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.016
- Muddy Green #657432 ΔE 0.020
- Brown Green #706C11 ΔE 0.022
- Browny Green #6F6C0A ΔE 0.023
- Dark Olive Green #556B2F ΔE 0.026
- Mud Green #606602 ΔE 0.033
- Greeny Brown #696006 ΔE 0.038
- Camo Green #526525 ΔE 0.041
Use #666D2C 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.