#66AA63
Closest named color: Algae (#54AC68). oklch(67.5% 0.123 143.2), rgb(102, 170, 99).
Aa
Black text reads best on this color (7.49:1).
About this color
#66AA63 is a medium-light, moderately saturated green. In OKLCH its lightness is 67%, its chroma 0.123 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae (#54AC68), ΔE 0.016 away. Black text reads best on it, at 7.49:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Algae (#54AC68) |
| Black text | 7.49:1 |
| White text | 2.80:1 |
Values
| HEX | #66AA63 |
| RGB | rgb(102, 170, 99) |
| HSL | hsl(117, 29%, 53%) |
| OKLCH | oklch(67.5% 0.123 143.2) |
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 #66AA63 | 2.80:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #66AA63 | 7.49:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #66AA63 text on white | 2.80:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #66AA63 text on black | 7.49:1 | AAA | Lc -48.1 | 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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#C9E1C7
oklch(88.5% 0.043 143.1)
-
Step 300
300
#A4CEA1
oklch(80.9% 0.077 143.1)
-
Step 400
400 (this color)
#66AA63
oklch(67.5% 0.123 143.2)
-
Step 500
500
#45A143
oklch(63.2% 0.158 143.1)
-
Step 600
600
#1D8B20
oklch(55.7% 0.171 143.1)
-
Step 700
700
#097611
oklch(49.2% 0.16 143.2)
-
Step 800
800
#106013
oklch(42.7% 0.132 143.2)
-
Step 900
900
#184F18
oklch(37.8% 0.103 143.2)
-
Step 950
950
#102E0F
oklch(26.9% 0.065 143)
#66AA63 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) | #AD9E5E | 0.092 |
| Deuteranopia (no green cones) | #A39867 | 0.091 |
| Tritanopia (no blue cones) | #5FA699 | 0.079 |
| Achromatopsia (no color) | #9A9A9A | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AA63
#66AA63
oklch(67.5% 0.123 143.2)
- #BB7CC2
#BB7CC2
oklch(67.5% 0.122 323.3)
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 #66AA63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae #54AC68 ΔE 0.016
- Dull Green #74A662 ΔE 0.017
- Asparagus #77AB56 ΔE 0.022
- Off Green #6BA353 ΔE 0.022
- Fern #63A950 ΔE 0.022
- Boring Green #63B365 ΔE 0.025
- Dark Pastel Green #56AE57 ΔE 0.027
- Dusty Green #76A973 ΔE 0.030
Use #66AA63 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.