#51B449
Closest named color: Leafy Green (#51B73B). oklch(68.7% 0.173 142.1), rgb(81, 180, 73).
Aa
Black text reads best on this color (7.97:1).
About this color
#51B449 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.173 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.017 away. Black text reads best on it, at 7.97:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.97:1 |
| White text | 2.63:1 |
Values
| HEX | #51B449 |
| RGB | rgb(81, 180, 73) |
| HSL | hsl(116, 42%, 50%) |
| OKLCH | oklch(68.7% 0.173 142.1) |
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 #51B449 | 2.63:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #51B449 | 7.97:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #51B449 text on white | 2.63:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #51B449 text on black | 7.97:1 | AAA | Lc -50.9 | 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
#C3E4BF
oklch(88.5% 0.061 142.1)
-
Step 300
300
#98D392
oklch(81% 0.108 142.3)
-
Step 400
400 (this color)
#51B449
oklch(68.7% 0.173 142.1)
-
Step 500
500
#0EA700
oklch(63.2% 0.213 142.2)
-
Step 600
600
#0A8C00
oklch(55.5% 0.188 142.2)
-
Step 700
700
#077600
oklch(49.1% 0.166 142.1)
-
Step 800
800
#056100
oklch(42.8% 0.144 142.1)
-
Step 900
900
#035100
oklch(37.7% 0.127 142.2)
-
Step 950
950
#013000
oklch(26.8% 0.091 142.2)
#51B449 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) | #B8A53E | 0.123 |
| Deuteranopia (no green cones) | #AB9C51 | 0.123 |
| Tritanopia (no blue cones) | #43AF9D | 0.112 |
| Achromatopsia (no color) | #9F9F9F | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B449
#51B449
oklch(68.7% 0.173 142.1)
- #CB71D9
#CB71D9
oklch(68.7% 0.174 322.1)
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 #51B449, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.017
- Grass #5CAC2D ΔE 0.026
- Dark Pastel Green #56AE57 ΔE 0.026
- Cool Green #33B864 ΔE 0.028
- Medium Green #39AD48 ΔE 0.028
- Shamrock #01B44C ΔE 0.031
- Leaf #71AA34 ΔE 0.035
- Fern #63A950 ΔE 0.037
Use #51B449 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.