#51BF69
Closest named color: Dark Mint (#48C072). oklch(72% 0.159 148.3), rgb(81, 191, 105).
Aa
Black text reads best on this color (9.00:1).
About this color
#51BF69 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.159 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 0.010 away. Black text reads best on it, at 9.00:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Dark Mint (#48C072) |
| Black text | 9.00:1 |
| White text | 2.33:1 |
Values
| HEX | #51BF69 |
| RGB | rgb(81, 191, 105) |
| HSL | hsl(133, 46%, 53%) |
| OKLCH | oklch(72% 0.159 148.3) |
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 #51BF69 | 2.33:1 | Fails | Lc -50.6 | Large or bold text, headings |
| Black text on #51BF69 | 9.00:1 | AAA | Lc 58.3 | Large or bold text, headings |
| #51BF69 text on white | 2.33:1 | Fails | Lc 45.7 | Large or bold text, headings |
| #51BF69 text on black | 9.00:1 | AAA | Lc -56.4 | 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
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DEF0DF
oklch(93.7% 0.03 146.9)
-
Step 200
200
#C1E4C5
oklch(88.5% 0.056 148.3)
-
Step 300
300
#94D39D
oklch(81% 0.099 148.3)
-
Step 400
400 (this color)
#51BF69
oklch(72% 0.159 148.3)
-
Step 500
500
#00A543
oklch(63% 0.181 148.3)
-
Step 600
600
#008B37
oklch(55.5% 0.16 148.3)
-
Step 700
700
#00752D
oklch(49.1% 0.141 148.2)
-
Step 800
800
#006024
oklch(42.7% 0.122 148.4)
-
Step 900
900
#00501C
oklch(37.6% 0.109 148.1)
-
Step 950
950
#00300E
oklch(27% 0.077 148.3)
#51BF69 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) | #C1B062 | 0.128 |
| Deuteranopia (no green cones) | #B2A66F | 0.126 |
| Tritanopia (no blue cones) | #37BBAA | 0.091 |
| Achromatopsia (no color) | #AAAAAA | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BF69
#51BF69
oklch(72% 0.159 148.3)
- #D97DD6
#D97DD6
oklch(72% 0.159 328.2)
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 #51BF69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mint #48C072 ΔE 0.010
- Algae Green #21C36F ΔE 0.022
- Dark Mint Green #20C073 ΔE 0.023
- Cool Green #33B864 ΔE 0.030
- Soft Green #6FC276 ΔE 0.033
- Boring Green #63B365 ΔE 0.034
- Turtle Green #75B84F ΔE 0.035
- Greenblue #23C48B ΔE 0.041
Use #51BF69 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.