#51A970
Closest named color: Algae (#54AC68). oklch(66.5% 0.121 153.3), rgb(81, 169, 112).
Aa
Black text reads best on this color (7.25:1).
About this color
#51A970 is a medium-light, moderately saturated green. In OKLCH its lightness is 67%, its chroma 0.121 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae (#54AC68), ΔE 0.016 away. Black text reads best on it, at 7.25:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Algae (#54AC68) |
| Black text | 7.25:1 |
| White text | 2.89:1 |
Values
| HEX | #51A970 |
| RGB | rgb(81, 169, 112) |
| HSL | hsl(141, 35%, 49%) |
| OKLCH | oklch(66.5% 0.121 153.3) |
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 #51A970 | 2.89:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #51A970 | 7.25:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #51A970 text on white | 2.89:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #51A970 text on black | 7.25:1 | AAA | Lc -46.8 | 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 500.
-
Step 50
50
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E2EDE5
oklch(93.6% 0.016 154.5)
-
Step 200
200
#CAE0CF
oklch(88.6% 0.033 152.4)
-
Step 300
300
#A4CCAF
oklch(80.8% 0.059 153.5)
-
Step 400
400
#71B285
oklch(70.7% 0.094 153.2)
-
Step 500
500 (this color)
#51A970
oklch(66.5% 0.121 153.3)
-
Step 600
600
#1E894D
oklch(55.7% 0.131 153.2)
-
Step 700
700
#0B743E
oklch(49.2% 0.122 153.3)
-
Step 800
800
#115E33
oklch(42.6% 0.101 153.2)
-
Step 900
900
#194D2D
oklch(37.6% 0.078 153.3)
-
Step 950
950
#102D1B
oklch(26.9% 0.049 154.2)
#51A970 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) | #A99D6C | 0.106 |
| Deuteranopia (no green cones) | #9C9474 | 0.104 |
| Tritanopia (no blue cones) | #3BA79A | 0.062 |
| Achromatopsia (no color) | #989898 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A970
#51A970
oklch(66.5% 0.121 153.3)
- #C076B3
#C076B3
oklch(66.5% 0.122 333.5)
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 #51A970, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae #54AC68 ΔE 0.016
- Dark Seafoam Green #3EAF76 ΔE 0.019
- Seaweed Green #35AD6B ΔE 0.024
- Tea #65AB7C ΔE 0.027
- Bluey Green #2BB179 ΔE 0.027
- Jade #1FA774 ΔE 0.030
- Medium Sea Green #3CB371 ΔE 0.030
- Jade Green #2BAF6A ΔE 0.031
Use #51A970 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.