#666E39
Closest named color: Dark Moss Green (#606C38). oklch(51.8% 0.076 116.2), rgb(102, 110, 57).
Aa
White text reads best on this color (5.44:1).
About this color
#666E39 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 52%, its chroma 0.076 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 0.011 away. White text reads best on it, at 5.44:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #666E39 |
| RGB | rgb(102, 110, 57) |
| HSL | hsl(69, 32%, 33%) |
| OKLCH | oklch(51.8% 0.076 116.2) |
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 #666E39 | 5.44:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #666E39 | 3.85:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #666E39 text on white | 5.44:1 | AA | Lc 77.2 | Fine for body text |
| #666E39 text on black | 3.85:1 | AA large text | Lc -24.6 | 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
#F5F6F2
oklch(97.1% 0.005 117.9)
-
Step 100
100
#E9EBE3
oklch(93.6% 0.011 118)
-
Step 200
200
#D8DBCC
oklch(88.5% 0.02 116)
-
Step 300
300
#BFC4A9
oklch(80.9% 0.037 115.8)
-
Step 400
400
#9EA67C
oklch(70.8% 0.059 116.7)
-
Step 500
500
#878F5A
oklch(63% 0.074 115.6)
-
Step 600
600
#71793F
oklch(55.5% 0.081 115.6)
-
Step 700
700 (this color)
#666E39
oklch(51.8% 0.076 116.2)
-
Step 800
800
#4D5329
oklch(42.6% 0.063 115.8)
-
Step 900
900
#404526
oklch(37.7% 0.049 116.3)
-
Step 950
950
#252817
oklch(26.8% 0.03 116.6)
#666E39 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) | #746935 | 0.024 |
| Deuteranopia (no green cones) | #746A3C | 0.025 |
| Tritanopia (no blue cones) | #6B6962 | 0.066 |
| Achromatopsia (no color) | #6A6A6A | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666E39
#666E39
oklch(51.8% 0.076 116.2)
- #6C5F8F
#6C5F8F
oklch(51.7% 0.076 296.1)
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 #666E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.011
- Muddy Green #657432 ΔE 0.022
- Dark Olive Green #556B2F ΔE 0.030
- Brown Green #706C11 ΔE 0.033
- Browny Green #6F6C0A ΔE 0.035
- Military Green #667C3E ΔE 0.041
- Mud Green #606602 ΔE 0.045
- Camo Green #526525 ΔE 0.046
Use #666E39 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.