#66B83E
Closest named color: Leafy Green (#51B73B). oklch(70.5% 0.176 137.1), rgb(102, 184, 62).
Aa
Black text reads best on this color (8.49:1).
About this color
#66B83E is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.176 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.019 away. Black text reads best on it, at 8.49:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.49:1 |
| White text | 2.47:1 |
Values
| HEX | #66B83E |
| RGB | rgb(102, 184, 62) |
| HSL | hsl(100, 50%, 48%) |
| OKLCH | oklch(70.5% 0.176 137.1) |
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 #66B83E | 2.47:1 | Fails | Lc -53.4 | Large or bold text, headings |
| Black text on #66B83E | 8.49:1 | AAA | Lc 55.6 | Large or bold text, headings |
| #66B83E text on white | 2.47:1 | Fails | Lc 48.4 | Large or bold text, headings |
| #66B83E text on black | 8.49:1 | AAA | Lc -53.6 | 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
#F1F8EE
oklch(97.1% 0.015 136.1)
-
Step 100
100
#E0EFDB
oklch(93.5% 0.031 137.8)
-
Step 200
200
#C7E3BC
oklch(88.5% 0.06 136.9)
-
Step 300
300
#9FD18A
oklch(80.8% 0.11 136.7)
-
Step 400
400 (this color)
#66B83E
oklch(70.5% 0.176 137.1)
-
Step 500
500
#48A200
oklch(63.2% 0.192 137)
-
Step 600
600
#3B8800
oklch(55.6% 0.169 137.1)
-
Step 700
700
#317200
oklch(49% 0.148 136.9)
-
Step 800
800
#275E00
oklch(42.7% 0.129 137)
-
Step 900
900
#1F4E00
oklch(37.6% 0.114 137)
-
Step 950
950
#102F00
oklch(27.1% 0.082 137)
#66B83E 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) | #BEA92E | 0.112 |
| Deuteranopia (no green cones) | #B3A248 | 0.113 |
| Tritanopia (no blue cones) | #62B29F | 0.123 |
| Achromatopsia (no color) | #A5A5A5 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B83E
#66B83E
oklch(70.5% 0.176 137.1)
- #CB78E7
#CB78E7
oklch(70.4% 0.176 317.1)
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 #66B83E, closest first.
No curated palette has a color within ΔE 0.04 of #66B83E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.019
- Turtle Green #75B84F ΔE 0.024
- Dark Lime #84B701 ΔE 0.035
- Frog Green #58BC08 ΔE 0.035
- Grass #5CAC2D ΔE 0.037
- Dark Lime Green #7EBD01 ΔE 0.038
- Leaf #71AA34 ΔE 0.038
- Dark Pastel Green #56AE57 ΔE 0.044
Use #66B83E 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.