#51AF5C
Closest named color: Dark Pastel Green (#56AE57). oklch(67.7% 0.149 146), rgb(81, 175, 92).
Aa
Black text reads best on this color (7.63:1).
About this color
#51AF5C is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.149 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 7.63:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.63:1 |
| White text | 2.74:1 |
Values
| HEX | #51AF5C |
| RGB | rgb(81, 175, 92) |
| HSL | hsl(127, 37%, 50%) |
| OKLCH | oklch(67.7% 0.149 146) |
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 #51AF5C | 2.74:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #51AF5C | 7.63:1 | AAA | Lc 51.2 | Large or bold text, headings |
| #51AF5C text on white | 2.74:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #51AF5C text on black | 7.63:1 | AAA | Lc -49.0 | 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
#C4E3C5
oklch(88.5% 0.052 146)
-
Step 300
300
#9AD19D
oklch(80.9% 0.092 146)
-
Step 400
400 (this color)
#51AF5C
oklch(67.7% 0.149 146)
-
Step 500
500
#0AA636
oklch(63.2% 0.191 145.9)
-
Step 600
600
#008C2B
oklch(55.7% 0.17 146)
-
Step 700
700
#007623
oklch(49.2% 0.15 146)
-
Step 800
800
#00601B
oklch(42.6% 0.13 146.1)
-
Step 900
900
#005115
oklch(37.8% 0.116 146)
-
Step 950
950
#03300B
oklch(27% 0.079 145.9)
#51AF5C 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) | #B1A155 | 0.115 |
| Deuteranopia (no green cones) | #A59962 | 0.114 |
| Tritanopia (no blue cones) | #40AB9B | 0.089 |
| Achromatopsia (no color) | #9C9C9C | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AF5C
#51AF5C
oklch(67.7% 0.149 146)
- #C674C8
#C674C8
oklch(67.8% 0.149 326.2)
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 #51AF5C, 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
- Algae #54AC68 ΔE 0.020
- Fern #63A950 ΔE 0.020
- Boring Green #63B365 ΔE 0.023
- Medium Sea Green #3CB371 ΔE 0.025
- Jade Green #2BAF6A ΔE 0.025
- Seaweed Green #35AD6B ΔE 0.026
- Cool Green #33B864 ΔE 0.027
Use #51AF5C 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.