#666D41
Closest named color: Dark Moss Green (#606C38). oklch(51.7% 0.065 116.1), rgb(102, 109, 65).
Aa
White text reads best on this color (5.48:1).
About this color
#666D41 is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.065 and its hue 116°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.015 away. White text reads best on it, at 5.48:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.065) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #666D41 |
| RGB | rgb(102, 109, 65) |
| HSL | hsl(70, 25%, 34%) |
| OKLCH | oklch(51.7% 0.065 116.1) |
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 #666D41 | 5.48:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #666D41 | 3.82:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #666D41 text on white | 5.48:1 | AA | Lc 77.4 | Fine for body text |
| #666D41 text on black | 3.82:1 | AA large text | Lc -24.4 | 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
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D8DBCE
oklch(88.6% 0.018 117.3)
-
Step 300
300
#BFC3AD
oklch(80.8% 0.03 115.5)
-
Step 400
400
#9EA582
oklch(70.7% 0.05 116.9)
-
Step 500
500
#878F62
oklch(63.2% 0.064 116.5)
-
Step 600
600
#717948
oklch(55.7% 0.071 116.3)
-
Step 700
700 (this color)
#666D41
oklch(51.7% 0.065 116.1)
-
Step 800
800
#4D5330
oklch(42.7% 0.054 116.7)
-
Step 900
900
#40442B
oklch(37.6% 0.04 115.8)
-
Step 950
950
#262819
oklch(27% 0.026 114.4)
#666D41 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) | #73693E | 0.022 |
| Deuteranopia (no green cones) | #726943 | 0.022 |
| Tritanopia (no blue cones) | #6B6862 | 0.056 |
| Achromatopsia (no color) | #696969 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666D41
#666D41
oklch(51.7% 0.065 116.1)
- #6B6189
#6B6189
oklch(51.8% 0.063 295.6)
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 #666D41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.015
- Muddy Green #657432 ΔE 0.032
- Dark Olive Green #556B2F ΔE 0.036
- Brown Green #706C11 ΔE 0.043
- Browny Green #6F6C0A ΔE 0.045
- Military Green #667C3E ΔE 0.047
- Dirt Brown #836539 ΔE 0.049
- Dark Taupe #7F684E ΔE 0.049
Use #666D41 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.