#66A953
Closest named color: Fern (#63A950). oklch(67% 0.138 139.1), rgb(102, 169, 83).
Aa
Black text reads best on this color (7.36:1).
About this color
#66A953 is a medium-light, moderately saturated green. In OKLCH its lightness is 67%, its chroma 0.138 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern (#63A950), ΔE 0.005 away. Black text reads best on it, at 7.36:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Fern (#63A950) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #66A953 |
| RGB | rgb(102, 169, 83) |
| HSL | hsl(107, 34%, 49%) |
| OKLCH | oklch(67% 0.138 139.1) |
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 #66A953 | 2.85:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #66A953 | 7.36:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #66A953 text on white | 2.85:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #66A953 text on black | 7.36:1 | AAA | Lc -47.4 | 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 400.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDE
oklch(93.6% 0.025 137.8)
-
Step 200
200
#CAE1C3
oklch(88.5% 0.047 138.4)
-
Step 300
300
#A4CF99
oklch(81% 0.087 139.3)
-
Step 400
400 (this color)
#66A953
oklch(67% 0.138 139.1)
-
Step 500
500
#48A129
oklch(63.1% 0.176 139)
-
Step 600
600
#2F8A00
oklch(55.7% 0.176 139.1)
-
Step 700
700
#267400
oklch(49.1% 0.155 139.2)
-
Step 800
800
#1E5F00
oklch(42.7% 0.135 139.1)
-
Step 900
900
#1A4F05
oklch(37.7% 0.115 139.2)
-
Step 950
950
#112E07
oklch(26.9% 0.072 138.8)
#66A953 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) | #AD9D4C | 0.093 |
| Deuteranopia (no green cones) | #A49759 | 0.093 |
| Tritanopia (no blue cones) | #62A495 | 0.093 |
| Achromatopsia (no color) | #999999 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A953
#66A953
oklch(67% 0.138 139.1)
- #B978CA
#B978CA
oklch(67% 0.136 319.1)
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 #66A953, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern #63A950 ΔE 0.005
- Off Green #6BA353 ΔE 0.018
- Dark Pastel Green #56AE57 ΔE 0.018
- Asparagus #77AB56 ΔE 0.021
- Algae #54AC68 ΔE 0.025
- Mid Green #50A747 ΔE 0.027
- Muted Green #5FA052 ΔE 0.028
- Dull Green #74A662 ΔE 0.028
Use #66A953 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.