#51C461
Closest named color: Algae Green (#21C36F). oklch(73.1% 0.173 146.1), rgb(81, 196, 97).
Aa
Black text reads best on this color (9.41:1).
About this color
#51C461 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.173 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.026 away. Black text reads best on it, at 9.41:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.41:1 |
| White text | 2.22:1 |
Values
| HEX | #51C461 |
| RGB | rgb(81, 196, 97) |
| HSL | hsl(128, 49%, 54%) |
| OKLCH | oklch(73.1% 0.173 146.1) |
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 #51C461 | 2.22:1 | Fails | Lc -48.4 | Large or bold text, headings |
| Black text on #51C461 | 9.41:1 | AAA | Lc 60.4 | Content text, not long reading |
| #51C461 text on white | 2.22:1 | Fails | Lc 43.6 | Non-text elements, placeholder text |
| #51C461 text on black | 9.41:1 | AAA | Lc -58.6 | 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 400.
-
Step 50
50
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DDF0DE
oklch(93.6% 0.031 146.8)
-
Step 200
200
#C0E4C2
oklch(88.4% 0.06 146.5)
-
Step 300
300
#92D497
oklch(81% 0.108 146.3)
-
Step 400
400 (this color)
#51C461
oklch(73.1% 0.173 146.1)
-
Step 500
500
#00A636
oklch(63.1% 0.192 146.2)
-
Step 600
600
#008C2C
oklch(55.7% 0.169 146.1)
-
Step 700
700
#007624
oklch(49.2% 0.15 146.2)
-
Step 800
800
#00601C
oklch(42.6% 0.129 146.3)
-
Step 900
900
#005116
oklch(37.9% 0.115 146.2)
-
Step 950
950
#003009
oklch(26.9% 0.082 146)
#51C461 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) | #C7B459 | 0.134 |
| Deuteranopia (no green cones) | #B8AA68 | 0.132 |
| Tritanopia (no blue cones) | #38C0AD | 0.103 |
| Achromatopsia (no color) | #AEAEAE | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C461
#51C461
oklch(73.1% 0.173 146.1)
- #DF7DE1
#DF7DE1
oklch(73.1% 0.173 326.4)
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 #51C461, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.026
- Dark Mint #48C072 ΔE 0.026
- Dark Mint Green #20C073 ΔE 0.034
- Turtle Green #75B84F ΔE 0.039
- Seaweed #18D17B ΔE 0.039
- Soft Green #6FC276 ΔE 0.039
- Shamrock Green #02C14D ΔE 0.040
- Cool Green #33B864 ΔE 0.042
Use #51C461 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.