#666B28
Closest named color: Dark Moss Green (#606C38). oklch(50.9% 0.09 113.1), rgb(102, 107, 40).
Aa
White text reads best on this color (5.67:1).
About this color
#666B28 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.090 and its hue 113°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.017 away. White text reads best on it, at 5.67:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.69:1 |
| White text | 5.67:1 |
Values
| HEX | #666B28 |
| RGB | rgb(102, 107, 40) |
| HSL | hsl(64, 46%, 29%) |
| OKLCH | oklch(50.9% 0.09 113.1) |
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 #666B28 | 5.67:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #666B28 | 3.69:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #666B28 text on white | 5.67:1 | AA | Lc 78.3 | Fine for body text |
| #666B28 text on black | 3.69:1 | AA large text | Lc -23.4 | 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
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#EAEBE1
oklch(93.7% 0.013 111.3)
-
Step 200
200
#D9DBC9
oklch(88.5% 0.024 112)
-
Step 300
300
#C0C4A4
oklch(80.9% 0.044 113.2)
-
Step 400
400
#A0A673
oklch(70.8% 0.07 113.7)
-
Step 500
500
#898F4E
oklch(63% 0.088 113.3)
-
Step 600
600
#747930
oklch(55.6% 0.096 112.8)
-
Step 700
700 (this color)
#666B28
oklch(50.9% 0.09 113.1)
-
Step 800
800
#4F531E
oklch(42.6% 0.075 113.1)
-
Step 900
900
#42451E
oklch(37.8% 0.059 112.8)
-
Step 950
950
#262813
oklch(26.9% 0.036 113.3)
#666B28 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) | #736620 | 0.023 |
| Deuteranopia (no green cones) | #73682C | 0.023 |
| Tritanopia (no blue cones) | #6D655D | 0.080 |
| Achromatopsia (no color) | #676767 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666B28
#666B28
oklch(50.9% 0.09 113.1)
- #685B94
#685B94
oklch(50.8% 0.09 293.4)
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 #666B28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.017
- Brown Green #706C11 ΔE 0.021
- Browny Green #6F6C0A ΔE 0.022
- Dark Olive Green #556B2F ΔE 0.024
- Muddy Green #657432 ΔE 0.025
- Mud Green #606602 ΔE 0.028
- Greeny Brown #696006 ΔE 0.032
- Camo Green #526525 ΔE 0.037
Use #666B28 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.