#666339
Closest named color: Dark Moss Green (#606C38). oklch(49.2% 0.061 104.9), rgb(102, 99, 57).
Aa
White text reads best on this color (6.16:1).
About this color
#666339 is a medium-dark, muted brown. In OKLCH its lightness is 49%, its chroma 0.061 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.029 away. White text reads best on it, at 6.16:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #666339 |
| RGB | rgb(102, 99, 57) |
| HSL | hsl(56, 28%, 31%) |
| OKLCH | oklch(49.2% 0.061 104.9) |
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 #666339 | 6.16:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #666339 | 3.40:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #666339 text on white | 6.16:1 | AA | Lc 80.7 | Fine for body text |
| #666339 text on black | 3.40:1 | AA large text | Lc -21.1 | 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
#F6F6F3
oklch(97.2% 0.004 106.5)
-
Step 100
100
#EAEAE4
oklch(93.5% 0.008 106.6)
-
Step 200
200
#DADACE
oklch(88.5% 0.016 106.7)
-
Step 300
300
#C3C2AC
oklch(80.9% 0.03 104.9)
-
Step 400
400
#A5A381
oklch(70.8% 0.047 104.7)
-
Step 500
500
#8F8C61
oklch(63.2% 0.06 104.6)
-
Step 600
600
#797647
oklch(55.7% 0.066 105.2)
-
Step 700
700 (this color)
#666339
oklch(49.2% 0.061 104.9)
-
Step 800
800
#53512F
oklch(42.8% 0.051 105.4)
-
Step 900
900
#45432A
oklch(37.8% 0.04 104.2)
-
Step 950
950
#282719
oklch(26.9% 0.024 104.5)
#666339 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) | #6A6036 | 0.010 |
| Deuteranopia (no green cones) | #6B623B | 0.009 |
| Tritanopia (no blue cones) | #6C5E59 | 0.055 |
| Achromatopsia (no color) | #616161 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666339
#666339
oklch(49.2% 0.061 104.9)
- #5D5C83
#5D5C83
oklch(49.2% 0.062 285.1)
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 #666339, 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
- Mud #735C12 ΔE 0.037
- Greeny Brown #696006 ΔE 0.039
- Dark Olive Green #556B2F ΔE 0.040
- Camo Green #526525 ΔE 0.043
- Dirt Brown #836539 ΔE 0.050
- Mud Green #606602 ΔE 0.050
- Brown Green #706C11 ΔE 0.052
Use #666339 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.