#51AC4E
Closest named color: Dark Pastel Green (#56AE57). oklch(66.7% 0.158 143), rgb(81, 172, 78).
Aa
Black text reads best on this color (7.36:1).
About this color
#51AC4E is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.158 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.012 away. Black text reads best on it, at 7.36:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #51AC4E |
| RGB | rgb(81, 172, 78) |
| HSL | hsl(118, 38%, 49%) |
| OKLCH | oklch(66.7% 0.158 143) |
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 #51AC4E | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #51AC4E | 7.36:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #51AC4E text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #51AC4E text on black | 7.36:1 | AAA | Lc -47.4 | 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 500.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE0
oklch(93.6% 0.023 141.2)
-
Step 200
200
#C9E1C7
oklch(88.5% 0.043 143.1)
-
Step 300
300
#A4CEA1
oklch(80.9% 0.077 143.1)
-
Step 400
400
#70B46C
oklch(70.6% 0.123 142.9)
-
Step 500
500 (this color)
#51AC4E
oklch(66.7% 0.158 143)
-
Step 600
600
#1D8B1F
oklch(55.7% 0.172 143)
-
Step 700
700
#0B7610
oklch(49.2% 0.16 143)
-
Step 800
800
#116012
oklch(42.7% 0.132 142.9)
-
Step 900
900
#184F17
oklch(37.8% 0.104 142.9)
-
Step 950
950
#102E0F
oklch(26.9% 0.065 143)
#51AC4E 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) | #AF9E45 | 0.114 |
| Deuteranopia (no green cones) | #A39655 | 0.114 |
| Tritanopia (no blue cones) | #44A797 | 0.101 |
| Achromatopsia (no color) | #999999 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AC4E
#51AC4E
oklch(66.7% 0.158 143)
- #C16FCC
#C16FCC
oklch(66.6% 0.158 322.7)
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 #51AC4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.012
- Mid Green #50A747 ΔE 0.015
- Fern #63A950 ΔE 0.018
- Medium Green #39AD48 ΔE 0.019
- Grass #5CAC2D ΔE 0.027
- Algae #54AC68 ΔE 0.031
- Leaf #71AA34 ΔE 0.032
- Jade Green #2BAF6A ΔE 0.033
Use #51AC4E 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.