#51A210
Closest named color: Grassy Green (#419C03). oklch(63.6% 0.184 136), rgb(81, 162, 16).
Aa
Black text reads best on this color (6.52:1).
About this color
#51A210 is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.184 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grassy Green (#419C03), ΔE 0.024 away. Black text reads best on it, at 6.52:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.184) |
| Temperature | in between |
| Nearest name | Grassy Green (#419C03) |
| Black text | 6.52:1 |
| White text | 3.21:1 |
Values
| HEX | #51A210 |
| RGB | rgb(81, 162, 16) |
| HSL | hsl(93, 82%, 35%) |
| OKLCH | oklch(63.6% 0.184 136) |
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 #51A210 | 3.21:1 | AA large text | Lc -64.5 | Content text, not long reading |
| Black text on #51A210 | 6.52:1 | AA | Lc 45.0 | Large or bold text, headings |
| #51A210 text on white | 3.21:1 | AA large text | Lc 59.1 | Large or bold text, headings |
| #51A210 text on black | 6.52:1 | AA | Lc -42.7 | Non-text elements, placeholder text |
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
#F2F7EF
oklch(97% 0.012 133.4)
-
Step 100
100
#E2EEDD
oklch(93.5% 0.026 136.3)
-
Step 200
200
#CBE1C1
oklch(88.5% 0.049 135.8)
-
Step 300
300
#A7CE94
oklch(80.8% 0.089 135.6)
-
Step 400
400
#76B455
oklch(70.6% 0.143 135.9)
-
Step 500
500 (this color)
#51A210
oklch(63.6% 0.184 136)
-
Step 600
600
#408700
oklch(55.5% 0.165 136)
-
Step 700
700
#357200
oklch(49.1% 0.146 136)
-
Step 800
800
#2A5D00
oklch(42.6% 0.127 136)
-
Step 900
900
#224E00
oklch(37.7% 0.112 136.1)
-
Step 950
950
#132E03
oklch(26.9% 0.075 136.2)
#51A210 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) | #A89400 | 0.113 |
| Deuteranopia (no green cones) | #9E8D26 | 0.113 |
| Tritanopia (no blue cones) | #4D9C89 | 0.131 |
| Achromatopsia (no color) | #8F8F8F | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A210
#51A210
oklch(63.6% 0.184 136)
- #B561D4
#B561D4
oklch(63.6% 0.183 316.1)
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 #51A210, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grassy Green #419C03 ΔE 0.024
- Leaf Green #5CA904 ΔE 0.024
- Grass Green #3F9B0B ΔE 0.027
- Grass #5CAC2D ΔE 0.033
- Mid Green #50A747 ΔE 0.036
- Kelly Green #02AB2E ΔE 0.037
- Medium Green #39AD48 ΔE 0.040
- Leaf #71AA34 ΔE 0.048
Use #51A210 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.