#51CD73
Closest named color: Seaweed (#18D17B). oklch(75.7% 0.169 149.6), rgb(81, 205, 115).
Aa
Black text reads best on this color (10.32:1).
About this color
#51CD73 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.169 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.022 away. Black text reads best on it, at 10.32:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.32:1 |
| White text | 2.03:1 |
Values
| HEX | #51CD73 |
| RGB | rgb(81, 205, 115) |
| HSL | hsl(136, 55%, 56%) |
| OKLCH | oklch(75.7% 0.169 149.6) |
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 #51CD73 | 2.03:1 | Fails | Lc -43.7 | Non-text elements, placeholder text |
| Black text on #51CD73 | 10.32:1 | AAA | Lc 64.7 | Content text, not long reading |
| #51CD73 text on white | 2.03:1 | Fails | Lc 39.2 | Non-text elements, placeholder text |
| #51CD73 text on black | 10.32:1 | AAA | Lc -63.2 | Content text, not long reading |
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 400.
-
Step 50
50
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BFE5C5
oklch(88.6% 0.059 149.6)
-
Step 300
300
#8FD49C
oklch(80.9% 0.105 149.5)
-
Step 400
400 (this color)
#51CD73
oklch(75.7% 0.169 149.6)
-
Step 500
500
#00A549
oklch(63.1% 0.176 149.5)
-
Step 600
600
#008B3D
oklch(55.6% 0.154 149.7)
-
Step 700
700
#007532
oklch(49.1% 0.137 149.6)
-
Step 800
800
#006028
oklch(42.7% 0.119 149.7)
-
Step 900
900
#005020
oklch(37.7% 0.105 149.6)
-
Step 950
950
#003010
oklch(27% 0.075 149.4)
#51CD73 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) | #CEBD6C | 0.138 |
| Deuteranopia (no green cones) | #BEB179 | 0.137 |
| Tritanopia (no blue cones) | #2DC9B7 | 0.094 |
| Achromatopsia (no color) | #B6B6B6 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51CD73
#51CD73
oklch(75.7% 0.169 149.6)
- #EA85E3
#EA85E3
oklch(75.7% 0.169 329.6)
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 #51CD73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.022
- Soft Green #6FC276 ΔE 0.038
- Dark Mint #48C072 ΔE 0.039
- Algae Green #21C36F ΔE 0.040
- Dark Mint Green #20C073 ΔE 0.048
- Greenblue #23C48B ΔE 0.050
- Apple #6ECB3C ΔE 0.050
- Emerald #06D6A0 ΔE 0.053
Use #51CD73 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.