#51AF4F
Closest named color: Dark Pastel Green (#56AE57). oklch(67.5% 0.161 143.2), rgb(81, 175, 79).
Aa
Black text reads best on this color (7.59:1).
About this color
#51AF4F is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.161 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 0.011 away. Black text reads best on it, at 7.59:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.161) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.59:1 |
| White text | 2.76:1 |
Values
| HEX | #51AF4F |
| RGB | rgb(81, 175, 79) |
| HSL | hsl(119, 38%, 50%) |
| OKLCH | oklch(67.5% 0.161 143.2) |
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 #51AF4F | 2.76:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #51AF4F | 7.59:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #51AF4F text on white | 2.76:1 | Fails | Lc 53.1 | Large or bold text, headings |
| #51AF4F text on black | 7.59:1 | AAA | Lc -48.8 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C4E3C2
oklch(88.4% 0.055 143.5)
-
Step 300
300
#9AD296
oklch(81% 0.101 143)
-
Step 400
400 (this color)
#51AF4F
oklch(67.5% 0.161 143.2)
-
Step 500
500
#0FA61B
oklch(63% 0.205 143.2)
-
Step 600
600
#008C0F
oklch(55.5% 0.185 143.2)
-
Step 700
700
#00760B
oklch(49.1% 0.163 143.2)
-
Step 800
800
#006107
oklch(42.7% 0.142 143.1)
-
Step 900
900
#005105
oklch(37.7% 0.126 143.2)
-
Step 950
950
#033004
oklch(26.9% 0.085 143.1)
#51AF4F 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) | #B2A146 | 0.117 |
| Deuteranopia (no green cones) | #A69856 | 0.117 |
| Tritanopia (no blue cones) | #43AA99 | 0.102 |
| Achromatopsia (no color) | #9B9B9B | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AF4F
#51AF4F
oklch(67.5% 0.161 143.2)
- #C571CF
#C571CF
oklch(67.5% 0.16 323.2)
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 #51AF4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.011
- Medium Green #39AD48 ΔE 0.021
- Fern #63A950 ΔE 0.022
- Mid Green #50A747 ΔE 0.023
- Grass #5CAC2D ΔE 0.027
- Cool Green #33B864 ΔE 0.029
- Leaf #71AA34 ΔE 0.032
- Boring Green #63B365 ΔE 0.033
Use #51AF4F 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.