#51AD5A
Closest named color: Dark Pastel Green (#56AE57). oklch(67.1% 0.148 145.6), rgb(81, 173, 90).
Aa
Black text reads best on this color (7.47:1).
About this color
#51AD5A is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.148 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.006 away. Black text reads best on it, at 7.47:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.47:1 |
| White text | 2.80:1 |
Values
| HEX | #51AD5A |
| RGB | rgb(81, 173, 90) |
| HSL | hsl(126, 36%, 50%) |
| OKLCH | oklch(67.1% 0.148 145.6) |
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 #51AD5A | 2.80:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #51AD5A | 7.47:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #51AD5A text on white | 2.80:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #51AD5A text on black | 7.47:1 | AAA | Lc -48.1 | 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
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C5E3C5
oklch(88.6% 0.052 145.1)
-
Step 300
300
#9AD19C
oklch(80.9% 0.093 145.5)
-
Step 400
400 (this color)
#51AD5A
oklch(67.1% 0.148 145.6)
-
Step 500
500
#14A536
oklch(63% 0.189 145.6)
-
Step 600
600
#008C28
oklch(55.7% 0.172 145.6)
-
Step 700
700
#007621
oklch(49.2% 0.152 145.7)
-
Step 800
800
#006119
oklch(42.8% 0.133 145.6)
-
Step 900
900
#005113
oklch(37.8% 0.117 145.5)
-
Step 950
950
#04300B
oklch(27.1% 0.078 145.5)
#51AD5A 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) | #B09F53 | 0.115 |
| Deuteranopia (no green cones) | #A39760 | 0.113 |
| Tritanopia (no blue cones) | #41A999 | 0.089 |
| Achromatopsia (no color) | #9A9A9A | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AD5A
#51AD5A
oklch(67.1% 0.148 145.6)
- #C373C6
#C373C6
oklch(67.2% 0.147 325.8)
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 #51AD5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.006
- Fern #63A950 ΔE 0.017
- Algae #54AC68 ΔE 0.019
- Mid Green #50A747 ΔE 0.023
- Seaweed Green #35AD6B ΔE 0.024
- Jade Green #2BAF6A ΔE 0.025
- Medium Sea Green #3CB371 ΔE 0.027
- Boring Green #63B365 ΔE 0.028
Use #51AD5A 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.