#51AC3E
Closest named color: Grass (#5CAC2D). oklch(66.5% 0.171 140.4), rgb(81, 172, 62).
Aa
Black text reads best on this color (7.32:1).
About this color
#51AC3E is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.171 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.014 away. Black text reads best on it, at 7.32:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.32:1 |
| White text | 2.86:1 |
Values
| HEX | #51AC3E |
| RGB | rgb(81, 172, 62) |
| HSL | hsl(110, 47%, 46%) |
| OKLCH | oklch(66.5% 0.171 140.4) |
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 #51AC3E | 2.86:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #51AC3E | 7.32:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #51AC3E text on white | 2.86:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #51AC3E text on black | 7.32:1 | AAA | Lc -47.2 | 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 500.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#C9E1C4
oklch(88.4% 0.047 140.3)
-
Step 300
300
#A4CE9B
oklch(80.8% 0.083 140.1)
-
Step 400
400
#70B563
oklch(70.7% 0.134 140.5)
-
Step 500
500 (this color)
#51AC3E
oklch(66.5% 0.171 140.4)
-
Step 600
600
#258B00
oklch(55.7% 0.181 140.4)
-
Step 700
700
#1D7500
oklch(49.2% 0.16 140.4)
-
Step 800
800
#166000
oklch(42.8% 0.139 140.4)
-
Step 900
900
#194F0C
oklch(37.7% 0.111 140.4)
-
Step 950
950
#102E0A
oklch(26.9% 0.07 140.5)
#51AC3E 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) | #B09D31 | 0.117 |
| Deuteranopia (no green cones) | #A59647 | 0.117 |
| Tritanopia (no blue cones) | #47A795 | 0.114 |
| Achromatopsia (no color) | #989898 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AC3E
#51AC3E
oklch(66.5% 0.171 140.4)
- #C16CD3
#C16CD3
oklch(66.5% 0.17 320.4)
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 #51AC3E, closest first.
No curated palette has a color within ΔE 0.04 of #51AC3E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.014
- Medium Green #39AD48 ΔE 0.016
- Mid Green #50A747 ΔE 0.019
- Dark Pastel Green #56AE57 ΔE 0.026
- Leaf Green #5CA904 ΔE 0.027
- Fern #63A950 ΔE 0.029
- Leaf #71AA34 ΔE 0.029
- Leafy Green #51B73B ΔE 0.033
Use #51AC3E 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.