#51AA4D
Closest named color: Mid Green (#50A747). oklch(66.2% 0.156 142.8), rgb(81, 170, 77).
Aa
Black text reads best on this color (7.20:1).
About this color
#51AA4D is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.156 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mid Green (#50A747), ΔE 0.010 away. Black text reads best on it, at 7.20:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Mid Green (#50A747) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #51AA4D |
| RGB | rgb(81, 170, 77) |
| HSL | hsl(117, 38%, 48%) |
| OKLCH | oklch(66.2% 0.156 142.8) |
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 #51AA4D | 2.91:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #51AA4D | 7.20:1 | AAA | Lc 48.8 | Large or bold text, headings |
| #51AA4D text on white | 2.91:1 | Fails | Lc 55.2 | Large or bold text, headings |
| #51AA4D text on black | 7.20:1 | AAA | Lc -46.6 | 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
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#CAE1C7
oklch(88.6% 0.043 142)
-
Step 300
300
#A4CEA1
oklch(80.9% 0.077 143.1)
-
Step 400
400
#71B46D
oklch(70.7% 0.122 142.9)
-
Step 500
500 (this color)
#51AA4D
oklch(66.2% 0.156 142.8)
-
Step 600
600
#218A20
oklch(55.5% 0.169 142.8)
-
Step 700
700
#107511
oklch(49% 0.157 142.8)
-
Step 800
800
#136013
oklch(42.8% 0.131 142.9)
-
Step 900
900
#194E18
oklch(37.5% 0.101 143)
-
Step 950
950
#112E0F
oklch(27% 0.064 142.4)
#51AA4D 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) | #AD9C44 | 0.113 |
| Deuteranopia (no green cones) | #A29454 | 0.114 |
| Tritanopia (no blue cones) | #45A595 | 0.100 |
| Achromatopsia (no color) | #979797 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AA4D
#51AA4D
oklch(66.2% 0.156 142.8)
- #BF6ECA
#BF6ECA
oklch(66.1% 0.157 322.7)
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 #51AA4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Green #50A747 ΔE 0.010
- Dark Pastel Green #56AE57 ΔE 0.015
- Fern #63A950 ΔE 0.017
- Medium Green #39AD48 ΔE 0.020
- Grass #5CAC2D ΔE 0.029
- Algae #54AC68 ΔE 0.031
- Muted Green #5FA052 ΔE 0.033
- Off Green #6BA353 ΔE 0.033
Use #51AA4D 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.