#66B053
Closest named color: Dark Pastel Green (#56AE57). oklch(68.7% 0.148 139.5), rgb(102, 176, 83).
Aa
Black text reads best on this color (7.89:1).
About this color
#66B053 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.148 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.017 away. Black text reads best on it, at 7.89:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.89:1 |
| White text | 2.65:1 |
Values
| HEX | #66B053 |
| RGB | rgb(102, 176, 83) |
| HSL | hsl(108, 37%, 51%) |
| OKLCH | oklch(68.7% 0.148 139.5) |
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 #66B053 | 2.65:1 | Fails | Lc -56.7 | Large or bold text, headings |
| Black text on #66B053 | 7.89:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #66B053 text on white | 2.65:1 | Fails | Lc 51.5 | Large or bold text, headings |
| #66B053 text on black | 7.89:1 | AAA | Lc -50.4 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E1EFDE
oklch(93.7% 0.027 140.2)
-
Step 200
200
#C8E2C2
oklch(88.5% 0.051 139.8)
-
Step 300
300
#A2D096
oklch(81% 0.093 139.2)
-
Step 400
400 (this color)
#66B053
oklch(68.7% 0.148 139.5)
-
Step 500
500
#3EA31C
oklch(63.1% 0.189 139.6)
-
Step 600
600
#2C8A00
oklch(55.6% 0.177 139.5)
-
Step 700
700
#247400
oklch(49.1% 0.156 139.5)
-
Step 800
800
#1C5F00
oklch(42.6% 0.136 139.5)
-
Step 900
900
#165000
oklch(37.9% 0.121 139.5)
-
Step 950
950
#0E2F05
oklch(27% 0.078 139.6)
#66B053 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) | #B5A34B | 0.102 |
| Deuteranopia (no green cones) | #AA9C59 | 0.101 |
| Tritanopia (no blue cones) | #60AB9B | 0.100 |
| Achromatopsia (no color) | #9F9F9F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B053
#66B053
oklch(68.7% 0.148 139.5)
- #C27AD3
#C27AD3
oklch(68.7% 0.148 319.8)
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 #66B053, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.017
- Boring Green #63B365 ΔE 0.019
- Fern #63A950 ΔE 0.020
- Asparagus #77AB56 ΔE 0.023
- Leaf #71AA34 ΔE 0.027
- Turtle Green #75B84F ΔE 0.030
- Algae #54AC68 ΔE 0.032
- Grass #5CAC2D ΔE 0.036
Use #66B053 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.