#66A445
Closest named color: Fern (#63A950). oklch(65.5% 0.144 136.1), rgb(102, 164, 69).
Aa
Black text reads best on this color (6.96:1).
About this color
#66A445 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.144 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern (#63A950), ΔE 0.015 away. Black text reads best on it, at 6.96:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Fern (#63A950) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #66A445 |
| RGB | rgb(102, 164, 69) |
| HSL | hsl(99, 41%, 46%) |
| OKLCH | oklch(65.5% 0.144 136.1) |
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 #66A445 | 3.01:1 | AA large text | Lc -62.1 | Content text, not long reading |
| Black text on #66A445 | 6.96:1 | AA | Lc 47.3 | Large or bold text, headings |
| #66A445 text on white | 3.01:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #66A445 text on black | 6.96:1 | AA | Lc -45.0 | Large or bold text, headings |
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
#F3F7F1
oklch(97.1% 0.009 134.9)
-
Step 100
100
#E4EDE0
oklch(93.6% 0.02 135.8)
-
Step 200
200
#CEDFC6
oklch(88.4% 0.038 135.5)
-
Step 300
300
#ACCC9F
oklch(81% 0.071 136.7)
-
Step 400
400
#80B169
oklch(70.8% 0.113 136.2)
-
Step 500
500 (this color)
#66A445
oklch(65.5% 0.144 136.1)
-
Step 600
600
#448615
oklch(55.5% 0.155 136)
-
Step 700
700
#357202
oklch(49.2% 0.146 136.1)
-
Step 800
800
#2D5D0A
oklch(42.8% 0.121 136)
-
Step 900
900
#294C14
oklch(37.7% 0.093 135.9)
-
Step 950
950
#182D0D
oklch(27.1% 0.06 136.2)
#66A445 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) | #A9983B | 0.089 |
| Deuteranopia (no green cones) | #A1934C | 0.090 |
| Tritanopia (no blue cones) | #649E8F | 0.103 |
| Achromatopsia (no color) | #949494 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A445
#66A445
oklch(65.5% 0.144 136.1)
- #B373CB
#B373CB
oklch(65.6% 0.143 316.3)
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 #66A445, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern #63A950 ΔE 0.015
- Off Green #6BA353 ΔE 0.018
- Mid Green #50A747 ΔE 0.021
- Muted Green #5FA052 ΔE 0.021
- Flat Green #699D4C ΔE 0.024
- Leaf #71AA34 ΔE 0.028
- Dark Pastel Green #56AE57 ΔE 0.029
- Asparagus #77AB56 ΔE 0.033
Use #66A445 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.