#66816F
Closest named color: Slate Green (#658D6D). oklch(57.7% 0.042 155.7), rgb(102, 129, 111).
Aa
Black text reads best on this color (4.93:1).
About this color
#66816F is a medium-dark, muted green. In OKLCH its lightness is 58%, its chroma 0.042 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.037 away. Black text reads best on it, at 4.93:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.042) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #66816F |
| RGB | rgb(102, 129, 111) |
| HSL | hsl(140, 12%, 45%) |
| OKLCH | oklch(57.7% 0.042 155.7) |
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 #66816F | 4.25:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #66816F | 4.93:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #66816F text on white | 4.25:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #66816F text on black | 4.93:1 | AA | Lc -32.3 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D4DBD6
oklch(88.5% 0.01 155.1)
-
Step 300
300
#B8C4BB
oklch(80.8% 0.018 153.5)
-
Step 400
400
#92A699
oklch(70.6% 0.029 157.1)
-
Step 500
500
#789180
oklch(63.2% 0.038 155.4)
-
Step 600
600 (this color)
#66816F
oklch(57.7% 0.042 155.7)
-
Step 700
700
#4F6857
oklch(49.2% 0.04 155)
-
Step 800
800
#415448
oklch(42.6% 0.031 157.1)
-
Step 900
900
#37463C
oklch(37.8% 0.026 155.8)
-
Step 950
950
#202923
oklch(27% 0.017 155.9)
#66816F 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) | #817D6E | 0.038 |
| Deuteranopia (no green cones) | #7C7970 | 0.038 |
| Tritanopia (no blue cones) | #62807C | 0.021 |
| Achromatopsia (no color) | #7B7B7B | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66816F
#66816F
oklch(57.7% 0.042 155.7)
- #8A7083
#8A7083
oklch(57.6% 0.043 335.9)
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 #66816F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.037
- Medium Grey #7D7F7C ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.042
- Steel Grey #6F828A ΔE 0.044
- Dark Sage #598556 ΔE 0.046
- Gray #808080 ΔE 0.048
- Battleship Gray #6C757D ΔE 0.048
- Dusty Teal #4C9085 ΔE 0.048
Use #66816F 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.