#51BB65
Closest named color: Dark Mint (#48C072). oklch(70.9% 0.157 147.6), rgb(81, 187, 101).
Aa
Black text reads best on this color (8.64:1).
About this color
#51BB65 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.157 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Mint (#48C072), ΔE 0.017 away. Black text reads best on it, at 8.64:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.157) |
| Temperature | in between |
| Nearest name | Dark Mint (#48C072) |
| Black text | 8.64:1 |
| White text | 2.42:1 |
Values
| HEX | #51BB65 |
| RGB | rgb(81, 187, 101) |
| HSL | hsl(131, 44%, 53%) |
| OKLCH | oklch(70.9% 0.157 147.6) |
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 #51BB65 | 2.42:1 | Fails | Lc -52.5 | Large or bold text, headings |
| Black text on #51BB65 | 8.64:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #51BB65 text on white | 2.42:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #51BB65 text on black | 8.64:1 | AAA | Lc -54.5 | 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
#C2E4C5
oklch(88.6% 0.055 147.5)
-
Step 300
300
#95D29C
oklch(80.8% 0.098 147.5)
-
Step 400
400 (this color)
#51BB65
oklch(70.9% 0.157 147.6)
-
Step 500
500
#00A63F
oklch(63.2% 0.185 147.5)
-
Step 600
600
#008B34
oklch(55.5% 0.162 147.6)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501A
oklch(37.6% 0.11 147.5)
-
Step 950
950
#00300D
oklch(27% 0.078 147.8)
#51BB65 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) | #BDAC5E | 0.125 |
| Deuteranopia (no green cones) | #AFA26B | 0.125 |
| Tritanopia (no blue cones) | #3AB7A6 | 0.091 |
| Achromatopsia (no color) | #A6A6A6 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BB65
#51BB65
oklch(70.9% 0.157 147.6)
- #D47BD3
#D47BD3
oklch(70.9% 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 #51BB65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mint #48C072 ΔE 0.017
- Cool Green #33B864 ΔE 0.021
- Dark Mint Green #20C073 ΔE 0.025
- Boring Green #63B365 ΔE 0.026
- Algae Green #21C36F ΔE 0.027
- Turtle Green #75B84F ΔE 0.033
- Medium Sea Green #3CB371 ΔE 0.034
- Dark Pastel Green #56AE57 ΔE 0.036
Use #51BB65 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.