#666D45
Closest named color: Dark Moss Green (#606C38). oklch(51.8% 0.059 116.6), rgb(102, 109, 69).
Aa
White text reads best on this color (5.47:1).
About this color
#666D45 is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.059 and its hue 117°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.020 away. White text reads best on it, at 5.47:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.83:1 |
| White text | 5.47:1 |
Values
| HEX | #666D45 |
| RGB | rgb(102, 109, 69) |
| HSL | hsl(70, 22%, 35%) |
| OKLCH | oklch(51.8% 0.059 116.6) |
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 #666D45 | 5.47:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #666D45 | 3.83:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #666D45 text on white | 5.47:1 | AA | Lc 77.3 | Fine for body text |
| #666D45 text on black | 3.83:1 | AA large text | Lc -24.5 | 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D8DBCF
oklch(88.6% 0.016 118.2)
-
Step 300
300
#BFC3AF
oklch(80.9% 0.028 116.2)
-
Step 400
400
#9EA584
oklch(70.7% 0.047 117.3)
-
Step 500
500
#878E66
oklch(63% 0.057 116.1)
-
Step 600
600
#71784D
oklch(55.6% 0.063 116)
-
Step 700
700 (this color)
#666D45
oklch(51.8% 0.059 116.6)
-
Step 800
800
#4D5333
oklch(42.8% 0.05 117.2)
-
Step 900
900
#40442D
oklch(37.6% 0.037 116.3)
-
Step 950
950
#26281A
oklch(27% 0.025 114.7)
#666D45 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) | #726942 | 0.020 |
| Deuteranopia (no green cones) | #726A47 | 0.021 |
| Tritanopia (no blue cones) | #6A6963 | 0.051 |
| Achromatopsia (no color) | #696969 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666D45
#666D45
oklch(51.8% 0.059 116.6)
- #6C6187
#6C6187
oklch(51.8% 0.06 297.5)
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 #666D45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.020
- Muddy Green #657432 ΔE 0.036
- Dark Olive Green #556B2F ΔE 0.040
- Dark Taupe #7F684E ΔE 0.046
- Grey Brown #7F7053 ΔE 0.047
- Brown Green #706C11 ΔE 0.048
- Dirt Brown #836539 ΔE 0.048
- Military Green #667C3E ΔE 0.049
Use #666D45 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.