#66B55D
Closest named color: Boring Green (#63B365). oklch(70.1% 0.146 141.8), rgb(102, 181, 93).
Aa
Black text reads best on this color (8.33:1).
About this color
#66B55D is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.146 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.012 away. Black text reads best on it, at 8.33:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.33:1 |
| White text | 2.52:1 |
Values
| HEX | #66B55D |
| RGB | rgb(102, 181, 93) |
| HSL | hsl(114, 37%, 54%) |
| OKLCH | oklch(70.1% 0.146 141.8) |
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 #66B55D | 2.52:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #66B55D | 8.33:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #66B55D text on white | 2.52:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #66B55D text on black | 8.33:1 | AAA | Lc -52.7 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDE
oklch(93.6% 0.028 142)
-
Step 200
200
#C7E2C3
oklch(88.5% 0.051 141.6)
-
Step 300
300
#9FD099
oklch(80.9% 0.092 141.9)
-
Step 400
400 (this color)
#66B55D
oklch(70.1% 0.146 141.8)
-
Step 500
500
#35A32A
oklch(63% 0.186 141.8)
-
Step 600
600
#138C00
oklch(55.6% 0.186 141.8)
-
Step 700
700
#0E7600
oklch(49.2% 0.165 141.8)
-
Step 800
800
#0A6100
oklch(42.8% 0.143 141.7)
-
Step 900
900
#0C5005
oklch(37.6% 0.121 141.8)
-
Step 950
950
#0B2F08
oklch(27% 0.076 142)
#66B55D 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) | #B9A856 | 0.105 |
| Deuteranopia (no green cones) | #AEA063 | 0.105 |
| Tritanopia (no blue cones) | #5EB0A0 | 0.094 |
| Achromatopsia (no color) | #A3A3A3 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B55D
#66B55D
oklch(70.1% 0.146 141.8)
- #C87ED4
#C87ED4
oklch(70.1% 0.145 321.8)
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 #66B55D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.012
- Turtle Green #75B84F ΔE 0.023
- Dark Pastel Green #56AE57 ΔE 0.027
- Asparagus #77AB56 ΔE 0.029
- Cool Green #33B864 ΔE 0.034
- Fern #63A950 ΔE 0.034
- Dark Mint #48C072 ΔE 0.035
- Algae #54AC68 ΔE 0.037
Use #66B55D 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.