#668C5A
Closest named color: Slate Green (#658D6D). oklch(59.8% 0.085 138.4), rgb(102, 140, 90).
Aa
Black text reads best on this color (5.46:1).
About this color
#668C5A is a medium-dark, moderately saturated green. In OKLCH its lightness is 60%, its chroma 0.085 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.025 away. Black text reads best on it, at 5.46:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.46:1 |
| White text | 3.84:1 |
Values
| HEX | #668C5A |
| RGB | rgb(102, 140, 90) |
| HSL | hsl(106, 22%, 45%) |
| OKLCH | oklch(59.8% 0.085 138.4) |
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 #668C5A | 3.84:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #668C5A | 5.46:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #668C5A text on white | 3.84:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #668C5A text on black | 5.46:1 | AA | Lc -35.8 | 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 500.
-
Step 50
50
#F4F6F3
oklch(97.1% 0.004 134.8)
-
Step 100
100
#E6ECE4
oklch(93.6% 0.012 137.8)
-
Step 200
200
#D2DDCE
oklch(88.5% 0.023 137.3)
-
Step 300
300
#B4C7AE
oklch(80.8% 0.04 138.2)
-
Step 400
400
#8CAB83
oklch(70.7% 0.066 138.7)
-
Step 500
500 (this color)
#668C5A
oklch(59.8% 0.085 138.4)
-
Step 600
600
#57804A
oklch(55.5% 0.092 138.4)
-
Step 700
700
#476C3B
oklch(49% 0.086 138.4)
-
Step 800
800
#3B5831
oklch(42.7% 0.071 138)
-
Step 900
900
#33492C
oklch(37.8% 0.055 138.3)
-
Step 950
950
#1E2B1A
oklch(27.2% 0.035 138.5)
#668C5A 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) | #8F8457 | 0.059 |
| Deuteranopia (no green cones) | #89815D | 0.057 |
| Tritanopia (no blue cones) | #64897F | 0.057 |
| Achromatopsia (no color) | #828282 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668C5A
#668C5A
oklch(59.8% 0.085 138.4)
- #956FA0
#956FA0
oklch(59.7% 0.085 318.5)
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 #668C5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.025
- Dark Sage #598556 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.032
- Khaki Green #728639 ΔE 0.036
- Camo #7F8F4E ΔE 0.037
- Drab Green #749551 ΔE 0.037
- Fern Green #548D44 ΔE 0.038
- Swamp #698339 ΔE 0.039
Use #668C5A 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.