#666A41
Closest named color: Dark Moss Green (#606C38). oklch(51% 0.06 113.1), rgb(102, 106, 65).
Aa
White text reads best on this color (5.67:1).
About this color
#666A41 is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.060 and its hue 113°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.018 away. White text reads best on it, at 5.67:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.70:1 |
| White text | 5.67:1 |
Values
| HEX | #666A41 |
| RGB | rgb(102, 106, 65) |
| HSL | hsl(66, 24%, 34%) |
| OKLCH | oklch(51% 0.06 113.1) |
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 #666A41 | 5.67:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #666A41 | 3.70:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #666A41 text on white | 5.67:1 | AA | Lc 78.4 | Fine for body text |
| #666A41 text on black | 3.70:1 | AA large text | Lc -23.4 | 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
#EAEAE4
oklch(93.5% 0.008 106.6)
-
Step 200
200
#D9DACE
oklch(88.4% 0.016 110.6)
-
Step 300
300
#C0C3AE
oklch(80.9% 0.029 113.6)
-
Step 400
400
#A0A483
oklch(70.7% 0.046 113.2)
-
Step 500
500
#898E64
oklch(63.2% 0.06 113.6)
-
Step 600
600
#73784B
oklch(55.7% 0.065 113.7)
-
Step 700
700 (this color)
#666A41
oklch(51% 0.06 113.1)
-
Step 800
800
#4F5232
oklch(42.7% 0.049 112.8)
-
Step 900
900
#41442C
oklch(37.7% 0.039 114.1)
-
Step 950
950
#26281A
oklch(27% 0.025 114.7)
#666A41 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) | #70663E | 0.018 |
| Deuteranopia (no green cones) | #706743 | 0.019 |
| Tritanopia (no blue cones) | #6B6660 | 0.052 |
| Achromatopsia (no color) | #676767 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666A41
#666A41
oklch(51% 0.06 113.1)
- #676086
#676086
oklch(51.1% 0.06 292.6)
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 #666A41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.018
- Dark Olive Green #556B2F ΔE 0.037
- Muddy Green #657432 ΔE 0.040
- Brown Green #706C11 ΔE 0.046
- Dirt Brown #836539 ΔE 0.047
- Dark Taupe #7F684E ΔE 0.047
- Camo Green #526525 ΔE 0.049
- Browny Green #6F6C0A ΔE 0.049
Use #666A41 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.