#51BF64
Closest named color: Dark Mint (#48C072). oklch(71.9% 0.164 147.1), rgb(81, 191, 100).
Aa
Black text reads best on this color (8.98:1).
About this color
#51BF64 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.164 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Mint (#48C072), ΔE 0.016 away. Black text reads best on it, at 8.98:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Dark Mint (#48C072) |
| Black text | 8.98:1 |
| White text | 2.33:1 |
Values
| HEX | #51BF64 |
| RGB | rgb(81, 191, 100) |
| HSL | hsl(130, 46%, 53%) |
| OKLCH | oklch(71.9% 0.164 147.1) |
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 #51BF64 | 2.33:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #51BF64 | 8.98:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #51BF64 text on white | 2.33:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #51BF64 text on black | 8.98:1 | AAA | Lc -56.3 | 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
#DEF0DF
oklch(93.7% 0.03 146.9)
-
Step 200
200
#C1E4C4
oklch(88.5% 0.057 147.4)
-
Step 300
300
#94D39A
oklch(80.9% 0.102 146.9)
-
Step 400
400 (this color)
#51BF64
oklch(71.9% 0.164 147.1)
-
Step 500
500
#00A63C
oklch(63.2% 0.188 147.1)
-
Step 600
600
#008B31
oklch(55.5% 0.165 147.1)
-
Step 700
700
#007528
oklch(49% 0.145 147.1)
-
Step 800
800
#00601F
oklch(42.6% 0.127 147)
-
Step 900
900
#005019
oklch(37.6% 0.111 147.2)
-
Step 950
950
#00300C
oklch(26.9% 0.079 147.3)
#51BF64 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) | #C1B05D | 0.128 |
| Deuteranopia (no green cones) | #B3A66A | 0.127 |
| Tritanopia (no blue cones) | #39BBA9 | 0.095 |
| Achromatopsia (no color) | #A9A9A9 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BF64
#51BF64
oklch(71.9% 0.164 147.1)
- #D97CD9
#D97CD9
oklch(71.9% 0.164 327.1)
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 #51BF64, closest first.
No curated palette has a color within ΔE 0.04 of #51BF64.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mint #48C072 ΔE 0.016
- Algae Green #21C36F ΔE 0.023
- Dark Mint Green #20C073 ΔE 0.025
- Cool Green #33B864 ΔE 0.029
- Turtle Green #75B84F ΔE 0.033
- Boring Green #63B365 ΔE 0.036
- Soft Green #6FC276 ΔE 0.037
- Leafy Green #51B73B ΔE 0.040
Use #51BF64 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.