#618666
Closest named color: Slate Green (#658D6D). oklch(58.3% 0.064 148.3), rgb(97, 134, 102).
Aa
Black text reads best on this color (5.11:1).
About this color
#618666 is a medium-dark, muted green. In OKLCH its lightness is 58%, its chroma 0.064 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.022 away. Black text reads best on it, at 5.11:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #618666 |
| RGB | rgb(97, 134, 102) |
| HSL | hsl(128, 16%, 45%) |
| OKLCH | oklch(58.3% 0.064 148.3) |
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 #618666 | 4.10:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #618666 | 5.11:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #618666 text on white | 4.10:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #618666 text on black | 5.11:1 | AA | Lc -33.5 | 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
#E6EBE7
oklch(93.5% 0.008 151.9)
-
Step 200
200
#D2DCD3
oklch(88.4% 0.016 148.4)
-
Step 300
300
#B5C6B6
oklch(80.9% 0.029 147)
-
Step 400
400
#8EA991
oklch(70.7% 0.046 148.2)
-
Step 500
500
#719476
oklch(63.2% 0.059 148.7)
-
Step 600
600 (this color)
#618666
oklch(58.3% 0.064 148.3)
-
Step 700
700
#496A4E
oklch(49% 0.059 148.6)
-
Step 800
800
#3C5740
oklch(42.8% 0.05 148.5)
-
Step 900
900
#344736
oklch(37.6% 0.037 147.6)
-
Step 950
950
#1E2A20
oklch(27% 0.025 149.5)
#618666 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) | #878064 | 0.053 |
| Deuteranopia (no green cones) | #817C68 | 0.052 |
| Tritanopia (no blue cones) | #5C847D | 0.037 |
| Achromatopsia (no color) | #7D7D7D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618666
#618666
oklch(58.3% 0.064 148.3)
- #906E8E
#906E8E
oklch(58.3% 0.063 328.3)
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 #618666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.022
- Dark Sage #598556 ΔE 0.025
- Dusty Teal #4C9085 ΔE 0.046
- Green Grey #77926F ΔE 0.048
- Military Green #667C3E ΔE 0.050
- Light Forest Green #4F9153 ΔE 0.053
- Swamp #698339 ΔE 0.054
- Drab #828344 ΔE 0.055
Use #618666 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.