#666E4D
Closest named color: Dark Moss Green (#606C38). oklch(52.2% 0.05 119.2), rgb(102, 110, 77).
Aa
White text reads best on this color (5.38:1).
About this color
#666E4D is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.050 and its hue 119°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.029 away. White text reads best on it, at 5.38:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.050) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.90:1 |
| White text | 5.38:1 |
Values
| HEX | #666E4D |
| RGB | rgb(102, 110, 77) |
| HSL | hsl(75, 18%, 37%) |
| OKLCH | oklch(52.2% 0.05 119.2) |
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 #666E4D | 5.38:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #666E4D | 3.90:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #666E4D text on white | 5.38:1 | AA | Lc 76.8 | Fine for body text |
| #666E4D text on black | 3.90:1 | AA large text | Lc -24.9 | 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 700.
-
Step 50
50
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EAE5
oklch(93.5% 0.007 115.7)
-
Step 200
200
#D8DAD1
oklch(88.4% 0.012 116.8)
-
Step 300
300
#BEC3B2
oklch(80.8% 0.024 120.3)
-
Step 400
400
#9DA489
oklch(70.6% 0.039 119.2)
-
Step 500
500
#868E6C
oklch(63.1% 0.05 118.6)
-
Step 600
600
#6F7854
oklch(55.5% 0.054 119.6)
-
Step 700
700 (this color)
#666E4D
oklch(52.2% 0.05 119.2)
-
Step 800
800
#4C5238
oklch(42.6% 0.041 118.8)
-
Step 900
900
#3F4431
oklch(37.6% 0.032 119.9)
-
Step 950
950
#25281D
oklch(27% 0.02 120.1)
#666E4D 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) | #726A4B | 0.020 |
| Deuteranopia (no green cones) | #716B4E | 0.019 |
| Tritanopia (no blue cones) | #696B65 | 0.041 |
| Achromatopsia (no color) | #6A6A6A | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666E4D
#666E4D
oklch(52.2% 0.05 119.2)
- #6D6383
#6D6383
oklch(52.1% 0.051 298.9)
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 #666E4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.029
- Grey Brown #7F7053 ΔE 0.042
- Dark Taupe #7F684E ΔE 0.042
- Muddy Green #657432 ΔE 0.043
- Dark Olive Green #556B2F ΔE 0.048
- Dirt Brown #836539 ΔE 0.050
- Dim Gray #696969 ΔE 0.050
- Military Green #667C3E ΔE 0.052
Use #666E4D 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.