#666B4A
Closest named color: Dark Moss Green (#606C38). oklch(51.4% 0.05 115.2), rgb(102, 107, 74).
Aa
White text reads best on this color (5.57:1).
About this color
#666B4A is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.050 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 0.028 away. White text reads best on it, at 5.57:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.050) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #666B4A |
| RGB | rgb(102, 107, 74) |
| HSL | hsl(69, 18%, 35%) |
| OKLCH | oklch(51.4% 0.05 115.2) |
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 #666B4A | 5.57:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #666B4A | 3.76:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #666B4A text on white | 5.57:1 | AA | Lc 77.9 | Fine for body text |
| #666B4A text on black | 3.76:1 | AA large text | Lc -23.9 | 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
#D8DAD0
oklch(88.4% 0.014 115.9)
-
Step 300
300
#C0C3B1
oklch(81% 0.025 114.6)
-
Step 400
400
#9FA489
oklch(70.7% 0.038 115.9)
-
Step 500
500
#888D6B
oklch(63% 0.049 114.6)
-
Step 600
600
#727753
oklch(55.5% 0.053 114.6)
-
Step 700
700 (this color)
#666B4A
oklch(51.4% 0.05 115.2)
-
Step 800
800
#4E5238
oklch(42.7% 0.041 115.3)
-
Step 900
900
#414430
oklch(37.8% 0.033 114.9)
-
Step 950
950
#26281C
oklch(27.1% 0.021 115.5)
#666B4A 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) | #706848 | 0.017 |
| Deuteranopia (no green cones) | #6F684B | 0.016 |
| Tritanopia (no blue cones) | #6A6762 | 0.043 |
| Achromatopsia (no color) | #686868 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666B4A
#666B4A
oklch(51.4% 0.05 115.2)
- #696281
#696281
oklch(51.4% 0.049 295)
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 #666B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.028
- Dark Taupe #7F684E ΔE 0.042
- Grey Brown #7F7053 ΔE 0.045
- Dark Olive Green #556B2F ΔE 0.046
- Muddy Green #657432 ΔE 0.047
- Dirt Brown #836539 ΔE 0.048
- Dim Gray #696969 ΔE 0.050
- Dull Brown #876E4B ΔE 0.055
Use #666B4A 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.