#51B147
Closest named color: Grass (#5CAC2D). oklch(67.9% 0.171 141.8), rgb(81, 177, 71).
Aa
Black text reads best on this color (7.72:1).
About this color
#51B147 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.171 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.021 away. Black text reads best on it, at 7.72:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #51B147 |
| RGB | rgb(81, 177, 71) |
| HSL | hsl(114, 43%, 49%) |
| OKLCH | oklch(67.9% 0.171 141.8) |
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 #51B147 | 2.71:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #51B147 | 7.72:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #51B147 text on white | 2.71:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #51B147 text on black | 7.72:1 | AAA | Lc -49.5 | 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 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
#C4E4C0
oklch(88.6% 0.059 142)
-
Step 300
300
#99D292
oklch(80.8% 0.106 141.9)
-
Step 400
400 (this color)
#51B147
oklch(67.9% 0.171 141.8)
-
Step 500
500
#18A600
oklch(63% 0.211 141.8)
-
Step 600
600
#128C00
oklch(55.6% 0.186 141.8)
-
Step 700
700
#0E7600
oklch(49.2% 0.165 141.8)
-
Step 800
800
#096100
oklch(42.8% 0.143 141.8)
-
Step 900
900
#065100
oklch(37.8% 0.127 141.8)
-
Step 950
950
#033000
oklch(26.9% 0.09 141.6)
#51B147 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) | #B5A23C | 0.121 |
| Deuteranopia (no green cones) | #A99A4F | 0.120 |
| Tritanopia (no blue cones) | #44AC9A | 0.111 |
| Achromatopsia (no color) | #9D9D9D | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B147
#51B147
oklch(67.9% 0.171 141.8)
- #C770D6
#C770D6
oklch(67.9% 0.17 321.6)
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 #51B147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.021
- Medium Green #39AD48 ΔE 0.022
- Dark Pastel Green #56AE57 ΔE 0.022
- Leafy Green #51B73B ΔE 0.023
- Mid Green #50A747 ΔE 0.029
- Shamrock #01B44C ΔE 0.031
- Cool Green #33B864 ΔE 0.031
- Fern #63A950 ΔE 0.031
Use #51B147 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.