#51B142
Closest named color: Grass (#5CAC2D). oklch(67.8% 0.175 141.1), rgb(81, 177, 66).
Aa
Black text reads best on this color (7.71:1).
About this color
#51B142 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.175 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.018 away. Black text reads best on it, at 7.71:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.71:1 |
| White text | 2.72:1 |
Values
| HEX | #51B142 |
| RGB | rgb(81, 177, 66) |
| HSL | hsl(112, 46%, 48%) |
| OKLCH | oklch(67.8% 0.175 141.1) |
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 #51B142 | 2.72:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #51B142 | 7.71:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #51B142 text on white | 2.72:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #51B142 text on black | 7.71:1 | 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
#DFF0DC
oklch(93.7% 0.032 141)
-
Step 200
200
#C4E4BE
oklch(88.6% 0.061 140.7)
-
Step 300
300
#99D290
oklch(80.8% 0.108 141.1)
-
Step 400
400 (this color)
#51B142
oklch(67.8% 0.175 141.1)
-
Step 500
500
#25A600
oklch(63.2% 0.208 141.1)
-
Step 600
600
#1D8B00
oklch(55.5% 0.183 141.1)
-
Step 700
700
#177500
oklch(49% 0.162 141.1)
-
Step 800
800
#116000
oklch(42.6% 0.141 141.1)
-
Step 900
900
#0D5000
oklch(37.6% 0.124 141)
-
Step 950
950
#053000
oklch(27% 0.089 141)
#51B142 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) | #B5A235 | 0.121 |
| Deuteranopia (no green cones) | #A99A4B | 0.121 |
| Tritanopia (no blue cones) | #45AC9A | 0.115 |
| Achromatopsia (no color) | #9D9D9D | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B142
#51B142
oklch(67.8% 0.175 141.1)
- #C76FD8
#C76FD8
oklch(67.9% 0.174 321)
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 #51B142, closest first.
No curated palette has a color within ΔE 0.04 of #51B142.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.018
- Leafy Green #51B73B ΔE 0.020
- Medium Green #39AD48 ΔE 0.022
- Dark Pastel Green #56AE57 ΔE 0.026
- Shamrock #01B44C ΔE 0.030
- Mid Green #50A747 ΔE 0.031
- Leaf #71AA34 ΔE 0.031
- Leaf Green #5CA904 ΔE 0.032
Use #51B142 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.