#51A101
Closest named color: Grassy Green (#419C03). oklch(63.3% 0.186 135.4), rgb(81, 161, 1).
Aa
Black text reads best on this color (6.44:1).
About this color
#51A101 is a medium-light, vivid green. In OKLCH its lightness is 63%, its chroma 0.186 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grassy Green (#419C03), ΔE 0.021 away. Black text reads best on it, at 6.44:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Grassy Green (#419C03) |
| Black text | 6.44:1 |
| White text | 3.25:1 |
Values
| HEX | #51A101 |
| RGB | rgb(81, 161, 1) |
| HSL | hsl(90, 99%, 32%) |
| OKLCH | oklch(63.3% 0.186 135.4) |
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 #51A101 | 3.25:1 | AA large text | Lc -64.9 | Content text, not long reading |
| Black text on #51A101 | 6.44:1 | AA | Lc 44.6 | Non-text elements, placeholder text |
| #51A101 text on white | 3.25:1 | AA large text | Lc 59.5 | Large or bold text, headings |
| #51A101 text on black | 6.44:1 | AA | Lc -42.2 | Non-text elements, placeholder text |
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
#F2F7EF
oklch(97% 0.012 133.4)
-
Step 100
100
#E2EEDD
oklch(93.5% 0.026 136.3)
-
Step 200
200
#CBE1C0
oklch(88.5% 0.05 135.1)
-
Step 300
300
#A7CE93
oklch(80.8% 0.091 135.3)
-
Step 400
400
#76B453
oklch(70.6% 0.145 135.5)
-
Step 500
500 (this color)
#51A101
oklch(63.3% 0.186 135.4)
-
Step 600
600
#438700
oklch(55.6% 0.164 135.4)
-
Step 700
700
#377100
oklch(49% 0.144 135.4)
-
Step 800
800
#2C5D00
oklch(42.7% 0.126 135.4)
-
Step 900
900
#244E00
oklch(37.8% 0.111 135.4)
-
Step 950
950
#142E02
oklch(27% 0.076 135.3)
#51A101 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) | #A79300 | 0.113 |
| Deuteranopia (no green cones) | #9D8C20 | 0.112 |
| Tritanopia (no blue cones) | #4E9A88 | 0.135 |
| Achromatopsia (no color) | #8E8E8E | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A101
#51A101
oklch(63.3% 0.186 135.4)
- #B460D5
#B460D5
oklch(63.4% 0.185 315.5)
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 #51A101, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grassy Green #419C03 ΔE 0.021
- Grass Green #3F9B0B ΔE 0.025
- Leaf Green #5CA904 ΔE 0.027
- Grass #5CAC2D ΔE 0.037
- Kelly Green #02AB2E ΔE 0.038
- Mid Green #50A747 ΔE 0.040
- Medium Green #39AD48 ΔE 0.043
- Leaf #71AA34 ΔE 0.051
Use #51A101 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.