#666B4D
Closest named color: Dark Moss Green (#606C38). oklch(51.5% 0.045 115.7), rgb(102, 107, 77).
Aa
White text reads best on this color (5.56:1).
About this color
#666B4D is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.045 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 0.032 away. White text reads best on it, at 5.56:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.77:1 |
| White text | 5.56:1 |
Values
| HEX | #666B4D |
| RGB | rgb(102, 107, 77) |
| HSL | hsl(70, 16%, 36%) |
| OKLCH | oklch(51.5% 0.045 115.7) |
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 #666B4D | 5.56:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #666B4D | 3.77:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #666B4D text on white | 5.56:1 | AA | Lc 77.8 | Fine for body text |
| #666B4D text on black | 3.77:1 | AA large text | Lc -24.0 | 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
#E9EAE6
oklch(93.5% 0.005 117.9)
-
Step 200
200
#D8DAD1
oklch(88.4% 0.012 116.8)
-
Step 300
300
#C0C3B3
oklch(81% 0.022 115.5)
-
Step 400
400
#9FA48B
oklch(70.8% 0.036 116.5)
-
Step 500
500
#888D6E
oklch(63.1% 0.045 115.1)
-
Step 600
600
#727756
oklch(55.6% 0.049 115)
-
Step 700
700 (this color)
#666B4D
oklch(51.5% 0.045 115.7)
-
Step 800
800
#4E523A
oklch(42.8% 0.038 115.7)
-
Step 900
900
#414432
oklch(37.8% 0.03 115.5)
-
Step 950
950
#26281D
oklch(27.1% 0.02 116.1)
#666B4D 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) | #6F684B | 0.015 |
| Deuteranopia (no green cones) | #6F684E | 0.016 |
| Tritanopia (no blue cones) | #696863 | 0.038 |
| Achromatopsia (no color) | #686868 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666B4D
#666B4D
oklch(51.5% 0.045 115.7)
- #69637F
#69637F
oklch(51.6% 0.044 294.6)
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 #666B4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.032
- Dark Taupe #7F684E ΔE 0.041
- Grey Brown #7F7053 ΔE 0.044
- Dim Gray #696969 ΔE 0.046
- Dirt Brown #836539 ΔE 0.049
- Dark Olive Green #556B2F ΔE 0.050
- Muddy Green #657432 ΔE 0.050
- Dull Brown #876E4B ΔE 0.054
Use #666B4D 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.