#66816C
Closest named color: Slate Green (#658D6D). oklch(57.6% 0.045 151.5), rgb(102, 129, 108).
Aa
Black text reads best on this color (4.92:1).
About this color
#66816C is a medium-dark, muted green. In OKLCH its lightness is 58%, its chroma 0.045 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.036 away. Black text reads best on it, at 4.92:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #66816C |
| RGB | rgb(102, 129, 108) |
| HSL | hsl(133, 12%, 45%) |
| OKLCH | oklch(57.6% 0.045 151.5) |
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 #66816C | 4.26:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #66816C | 4.92:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #66816C text on white | 4.26:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #66816C text on black | 4.92:1 | AA | Lc -32.2 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D4DBD5
oklch(88.4% 0.011 149.8)
-
Step 300
300
#B8C5BA
oklch(81% 0.021 150)
-
Step 400
400
#93A797
oklch(70.8% 0.032 151.3)
-
Step 500
500
#78917D
oklch(63.1% 0.041 151)
-
Step 600
600 (this color)
#66816C
oklch(57.6% 0.045 151.5)
-
Step 700
700
#4F6855
oklch(49.1% 0.042 152)
-
Step 800
800
#415546
oklch(42.8% 0.035 152.4)
-
Step 900
900
#37463A
oklch(37.7% 0.028 150.8)
-
Step 950
950
#202922
oklch(27% 0.018 151.7)
#66816C 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) | #817C6B | 0.039 |
| Deuteranopia (no green cones) | #7D796D | 0.039 |
| Tritanopia (no blue cones) | #62807B | 0.024 |
| Achromatopsia (no color) | #7A7A7A | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66816C
#66816C
oklch(57.6% 0.045 151.5)
- #897085
#897085
oklch(57.6% 0.044 331.6)
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 #66816C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.036
- Dark Sage #598556 ΔE 0.042
- Medium Grey #7D7F7C ΔE 0.044
- Battleship Grey #6B7C85 ΔE 0.047
- Steel Grey #6F828A ΔE 0.048
- Dusty Teal #4C9085 ΔE 0.050
- Gray #808080 ΔE 0.051
- Battleship Gray #6C757D ΔE 0.052
Use #66816C 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.