#666137
Closest named color: Dark Moss Green (#606C38). oklch(48.7% 0.061 102.4), rgb(102, 97, 55).
Aa
White text reads best on this color (6.30:1).
About this color
#666137 is a medium-dark, muted brown. In OKLCH its lightness is 49%, its chroma 0.061 and its hue 102°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.033 away. White text reads best on it, at 6.30:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #666137 |
| RGB | rgb(102, 97, 55) |
| HSL | hsl(54, 30%, 31%) |
| OKLCH | oklch(48.7% 0.061 102.4) |
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 #666137 | 6.30:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #666137 | 3.33:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #666137 text on white | 6.30:1 | AA | Lc 81.4 | Fine for body text |
| #666137 text on black | 3.33:1 | AA large text | Lc -20.5 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE4
oklch(93.6% 0.008 98.9)
-
Step 200
200
#DBDACE
oklch(88.6% 0.016 102.9)
-
Step 300
300
#C4C2AC
oklch(81% 0.03 102.8)
-
Step 400
400
#A6A280
oklch(70.7% 0.047 101.9)
-
Step 500
500
#908B60
oklch(63% 0.06 102.3)
-
Step 600
600
#7A7547
oklch(55.6% 0.065 102.9)
-
Step 700
700 (this color)
#666137
oklch(48.7% 0.061 102.4)
-
Step 800
800
#54502F
oklch(42.6% 0.05 102.3)
-
Step 900
900
#45432A
oklch(37.8% 0.04 104.2)
-
Step 950
950
#292719
oklch(27% 0.024 101)
#666137 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) | #685E34 | 0.009 |
| Deuteranopia (no green cones) | #6A6139 | 0.007 |
| Tritanopia (no blue cones) | #6C5C57 | 0.055 |
| Achromatopsia (no color) | #606060 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666137
#666137
oklch(48.7% 0.061 102.4)
- #5A5B81
#5A5B81
oklch(48.6% 0.061 282.7)
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 #666137, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.033
- Mud #735C12 ΔE 0.035
- Greeny Brown #696006 ΔE 0.038
- Dark Olive Green #556B2F ΔE 0.043
- Camo Green #526525 ΔE 0.043
- Olive Brown #645403 ΔE 0.049
- Mud Green #606602 ΔE 0.050
- Dirt Brown #836539 ΔE 0.052
Use #666137 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.