#51B963
Closest named color: Cool Green (#33B864). oklch(70.4% 0.156 147.2), rgb(81, 185, 99).
Aa
Black text reads best on this color (8.46:1).
About this color
#51B963 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.156 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.019 away. Black text reads best on it, at 8.46:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.46:1 |
| White text | 2.47:1 |
Values
| HEX | #51B963 |
| RGB | rgb(81, 185, 99) |
| HSL | hsl(130, 43%, 52%) |
| OKLCH | oklch(70.4% 0.156 147.2) |
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 #51B963 | 2.47:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #51B963 | 8.46:1 | AAA | Lc 55.6 | Large or bold text, headings |
| #51B963 text on white | 2.47:1 | Fails | Lc 48.4 | Large or bold text, headings |
| #51B963 text on black | 8.46:1 | AAA | Lc -53.6 | 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
#DEEFDF
oklch(93.5% 0.028 147)
-
Step 200
200
#C2E3C5
oklch(88.4% 0.054 147.6)
-
Step 300
300
#96D29C
oklch(80.9% 0.097 147.1)
-
Step 400
400 (this color)
#51B963
oklch(70.4% 0.156 147.2)
-
Step 500
500
#00A63D
oklch(63.2% 0.187 147.2)
-
Step 600
600
#008B32
oklch(55.5% 0.164 147.3)
-
Step 700
700
#007529
oklch(49% 0.144 147.3)
-
Step 800
800
#006020
oklch(42.6% 0.126 147.3)
-
Step 900
900
#005019
oklch(37.6% 0.111 147.2)
-
Step 950
950
#00300C
oklch(26.9% 0.079 147.3)
#51B963 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) | #BBAA5C | 0.124 |
| Deuteranopia (no green cones) | #ADA169 | 0.122 |
| Tritanopia (no blue cones) | #3BB5A4 | 0.091 |
| Achromatopsia (no color) | #A4A4A4 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B963
#51B963
oklch(70.4% 0.156 147.2)
- #D279D1
#D279D1
oklch(70.3% 0.157 327.5)
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 #51B963, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.019
- Dark Mint #48C072 ΔE 0.022
- Boring Green #63B365 ΔE 0.022
- Dark Mint Green #20C073 ΔE 0.027
- Dark Pastel Green #56AE57 ΔE 0.030
- Medium Sea Green #3CB371 ΔE 0.031
- Algae Green #21C36F ΔE 0.031
- Turtle Green #75B84F ΔE 0.033
Use #51B963 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.