#51AB54
Closest named color: Dark Pastel Green (#56AE57). oklch(66.5% 0.151 144.3), rgb(81, 171, 84).
Aa
Black text reads best on this color (7.30:1).
About this color
#51AB54 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.151 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.010 away. Black text reads best on it, at 7.30:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.30:1 |
| White text | 2.87:1 |
Values
| HEX | #51AB54 |
| RGB | rgb(81, 171, 84) |
| HSL | hsl(122, 36%, 49%) |
| OKLCH | oklch(66.5% 0.151 144.3) |
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 #51AB54 | 2.87:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #51AB54 | 7.30:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #51AB54 text on white | 2.87:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #51AB54 text on black | 7.30:1 | AAA | Lc -47.1 | 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
#C9E1C9
oklch(88.5% 0.041 145.2)
-
Step 300
300
#A4CEA3
oklch(81% 0.074 144.3)
-
Step 400
400
#70B471
oklch(70.7% 0.118 144.5)
-
Step 500
500 (this color)
#51AB54
oklch(66.5% 0.151 144.3)
-
Step 600
600
#1E8A2A
oklch(55.5% 0.163 144.3)
-
Step 700
700
#0C751C
oklch(49% 0.152 144.3)
-
Step 800
800
#12601A
oklch(42.8% 0.127 144.2)
-
Step 900
900
#194E1C
oklch(37.6% 0.097 144.2)
-
Step 950
950
#102E11
oklch(27% 0.063 144.2)
#51AB54 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) | #AE9D4D | 0.114 |
| Deuteranopia (no green cones) | #A2955A | 0.113 |
| Tritanopia (no blue cones) | #43A797 | 0.094 |
| Achromatopsia (no color) | #989898 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AB54
#51AB54
oklch(66.5% 0.151 144.3)
- #C070C7
#C070C7
oklch(66.4% 0.151 324.1)
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 #51AB54, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.010
- Fern #63A950 ΔE 0.015
- Mid Green #50A747 ΔE 0.016
- Algae #54AC68 ΔE 0.024
- Medium Green #39AD48 ΔE 0.024
- Seaweed Green #35AD6B ΔE 0.028
- Jade Green #2BAF6A ΔE 0.028
- Off Green #6BA353 ΔE 0.031
Use #51AB54 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.