#51A565
Closest named color: Algae (#54AC68). oklch(65.3% 0.126 149.5), rgb(81, 165, 101).
Aa
Black text reads best on this color (6.91:1).
About this color
#51A565 is a medium-light, moderately saturated green. In OKLCH its lightness is 65%, its chroma 0.126 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae (#54AC68), ΔE 0.021 away. Black text reads best on it, at 6.91:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Algae (#54AC68) |
| Black text | 6.91:1 |
| White text | 3.03:1 |
Values
| HEX | #51A565 |
| RGB | rgb(81, 165, 101) |
| HSL | hsl(134, 34%, 48%) |
| OKLCH | oklch(65.3% 0.126 149.5) |
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 #51A565 | 3.03:1 | AA large text | Lc -62.3 | Content text, not long reading |
| Black text on #51A565 | 6.91:1 | AA | Lc 47.1 | Large or bold text, headings |
| #51A565 text on white | 3.03:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #51A565 text on black | 6.91:1 | AA | Lc -44.9 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CAE0CD
oklch(88.5% 0.035 149.3)
-
Step 300
300
#A5CCAC
oklch(80.8% 0.061 150.1)
-
Step 400
400
#73B27F
oklch(70.7% 0.099 149.4)
-
Step 500
500 (this color)
#51A565
oklch(65.3% 0.126 149.5)
-
Step 600
600
#268945
oklch(55.7% 0.137 149.6)
-
Step 700
700
#167436
oklch(49.2% 0.127 149.5)
-
Step 800
800
#175E2D
oklch(42.6% 0.105 149.5)
-
Step 900
900
#1B4D29
oklch(37.6% 0.081 149.9)
-
Step 950
950
#122D18
oklch(26.9% 0.051 149.2)
#51A565 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) | #A69961 | 0.104 |
| Deuteranopia (no green cones) | #9A9169 | 0.102 |
| Tritanopia (no blue cones) | #40A295 | 0.071 |
| Achromatopsia (no color) | #949494 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A565
#51A565
oklch(65.3% 0.126 149.5)
- #BA72B5
#BA72B5
oklch(65.2% 0.126 329.4)
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 #51A565, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae #54AC68 ΔE 0.021
- Muted Green #5FA052 ΔE 0.023
- Seaweed Green #35AD6B ΔE 0.026
- Off Green #6BA353 ΔE 0.028
- Jade #1FA774 ΔE 0.030
- Dark Seafoam Green #3EAF76 ΔE 0.030
- Jade Green #2BAF6A ΔE 0.033
- Fern #63A950 ΔE 0.033
Use #51A565 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.