#51A72E
Closest named color: Grass (#5CAC2D). oklch(65% 0.176 138.3), rgb(81, 167, 46).
Aa
Black text reads best on this color (6.91:1).
About this color
#51A72E is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.176 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.019 away. Black text reads best on it, at 6.91:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 6.91:1 |
| White text | 3.03:1 |
Values
| HEX | #51A72E |
| RGB | rgb(81, 167, 46) |
| HSL | hsl(103, 57%, 42%) |
| OKLCH | oklch(65% 0.176 138.3) |
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 #51A72E | 3.03:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #51A72E | 6.91:1 | AA | Lc 47.2 | Large or bold text, headings |
| #51A72E text on white | 3.03:1 | AA large text | Lc 56.8 | Large or bold text, headings |
| #51A72E text on black | 6.91:1 | AA | Lc -44.9 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDE
oklch(93.6% 0.025 137.8)
-
Step 200
200
#CAE1C3
oklch(88.5% 0.047 138.4)
-
Step 300
300
#A5CE98
oklch(80.8% 0.086 138.3)
-
Step 400
400
#73B55D
oklch(70.8% 0.139 138.3)
-
Step 500
500 (this color)
#51A72E
oklch(65% 0.176 138.3)
-
Step 600
600
#348900
oklch(55.6% 0.173 138.4)
-
Step 700
700
#2B7300
oklch(49% 0.152 138.2)
-
Step 800
800
#225F00
oklch(42.8% 0.133 138.3)
-
Step 900
900
#1C4F03
oklch(37.8% 0.115 138.4)
-
Step 950
950
#122E07
oklch(26.9% 0.072 138.2)
#51A72E 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) | #AC9819 | 0.114 |
| Deuteranopia (no green cones) | #A1913A | 0.115 |
| Tritanopia (no blue cones) | #4AA18F | 0.122 |
| Achromatopsia (no color) | #949494 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A72E
#51A72E
oklch(65% 0.176 138.3)
- #BB67D3
#BB67D3
oklch(65.1% 0.175 318.3)
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 #51A72E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.019
- Leaf Green #5CA904 ΔE 0.020
- Mid Green #50A747 ΔE 0.021
- Medium Green #39AD48 ΔE 0.024
- Kelly Green #02AB2E ΔE 0.035
- Leaf #71AA34 ΔE 0.035
- Fern #63A950 ΔE 0.038
- Grassy Green #419C03 ΔE 0.039
Use #51A72E 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.