#51AD29
Closest named color: Grass (#5CAC2D). oklch(66.6% 0.186 138.2), rgb(81, 173, 41).
Aa
Black text reads best on this color (7.35:1).
About this color
#51AD29 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.186 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.011 away. Black text reads best on it, at 7.35:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.35:1 |
| White text | 2.85:1 |
Values
| HEX | #51AD29 |
| RGB | rgb(81, 173, 41) |
| HSL | hsl(102, 62%, 42%) |
| OKLCH | oklch(66.6% 0.186 138.2) |
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 #51AD29 | 2.85:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #51AD29 | 7.35:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #51AD29 text on white | 2.85:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #51AD29 text on black | 7.35:1 | AAA | Lc -47.5 | 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
#F2F8F0
oklch(97.2% 0.012 137.8)
-
Step 100
100
#E1EEDD
oklch(93.5% 0.026 138.3)
-
Step 200
200
#C9E2C1
oklch(88.6% 0.052 138.1)
-
Step 300
300
#A4CF96
oklch(80.9% 0.09 138.1)
-
Step 400
400
#70B658
oklch(70.8% 0.146 138.3)
-
Step 500
500 (this color)
#51AD29
oklch(66.6% 0.186 138.2)
-
Step 600
600
#358900
oklch(55.6% 0.173 138.2)
-
Step 700
700
#2B7300
oklch(49% 0.152 138.2)
-
Step 800
800
#225F00
oklch(42.8% 0.133 138.3)
-
Step 900
900
#1B4F00
oklch(37.7% 0.117 138.3)
-
Step 950
950
#102F04
oklch(27.1% 0.078 138.3)
#51AD29 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) | #B29E0A | 0.119 |
| Deuteranopia (no green cones) | #A79637 | 0.121 |
| Tritanopia (no blue cones) | #49A794 | 0.129 |
| Achromatopsia (no color) | #999999 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AD29
#51AD29
oklch(66.6% 0.186 138.2)
- #C268DC
#C268DC
oklch(66.5% 0.186 318.2)
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 #51AD29, closest first.
No curated palette has a color within ΔE 0.04 of #51AD29.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.011
- Leaf Green #5CA904 ΔE 0.015
- Medium Green #39AD48 ΔE 0.026
- Leafy Green #51B73B ΔE 0.028
- Mid Green #50A747 ΔE 0.033
- Leaf #71AA34 ΔE 0.034
- Shamrock #01B44C ΔE 0.035
- Kelly Green #02AB2E ΔE 0.035
Use #51AD29 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.