#51AE41
Closest named color: Grass (#5CAC2D). oklch(67.1% 0.171 140.9), rgb(81, 174, 65).
Aa
Black text reads best on this color (7.48:1).
About this color
#51AE41 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.171 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.015 away. Black text reads best on it, at 7.48:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.48:1 |
| White text | 2.80:1 |
Values
| HEX | #51AE41 |
| RGB | rgb(81, 174, 65) |
| HSL | hsl(111, 46%, 47%) |
| OKLCH | oklch(67.1% 0.171 140.9) |
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 #51AE41 | 2.80:1 | Fails | Lc -58.9 | Large or bold text, headings |
| Black text on #51AE41 | 7.48:1 | AAA | Lc 50.4 | Large or bold text, headings |
| #51AE41 text on white | 2.80:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #51AE41 text on black | 7.48:1 | AAA | Lc -48.2 | 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 400.
-
Step 50
50
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DFEFDC
oklch(93.5% 0.03 140.8)
-
Step 200
200
#C4E4BF
oklch(88.6% 0.06 141.3)
-
Step 300
300
#9AD291
oklch(80.9% 0.107 141.1)
-
Step 400
400 (this color)
#51AE41
oklch(67.1% 0.171 140.9)
-
Step 500
500
#28A500
oklch(63% 0.206 140.8)
-
Step 600
600
#208B00
oklch(55.6% 0.182 140.8)
-
Step 700
700
#197500
oklch(49.1% 0.161 140.9)
-
Step 800
800
#136000
oklch(42.7% 0.14 140.8)
-
Step 900
900
#0E5000
oklch(37.6% 0.123 140.9)
-
Step 950
950
#053000
oklch(27% 0.089 141)
#51AE41 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) | #B29F34 | 0.118 |
| Deuteranopia (no green cones) | #A6974A | 0.119 |
| Tritanopia (no blue cones) | #46A997 | 0.113 |
| Achromatopsia (no color) | #9A9A9A | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AE41
#51AE41
oklch(67.1% 0.171 140.9)
- #C46DD5
#C46DD5
oklch(67.1% 0.172 320.9)
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 #51AE41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.015
- Medium Green #39AD48 ΔE 0.017
- Mid Green #50A747 ΔE 0.023
- Dark Pastel Green #56AE57 ΔE 0.024
- Leafy Green #51B73B ΔE 0.028
- Leaf #71AA34 ΔE 0.029
- Leaf Green #5CA904 ΔE 0.029
- Fern #63A950 ΔE 0.030
Use #51AE41 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.