#3FBB63
Closest named color: Cool Green (#33B864). oklch(70.3% 0.167 149.4), rgb(63, 187, 99).
Aa
Black text reads best on this color (8.49:1).
About this color
#3FBB63 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.167 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.012 away. Black text reads best on it, at 8.49:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.167) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.49:1 |
| White text | 2.47:1 |
Values
| HEX | #3FBB63 |
| RGB | rgb(63, 187, 99) |
| HSL | hsl(137, 50%, 49%) |
| OKLCH | oklch(70.3% 0.167 149.4) |
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 #3FBB63 | 2.47:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #3FBB63 | 8.49:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #3FBB63 text on white | 2.47:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #3FBB63 text on black | 8.49:1 | AAA | Lc -53.8 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DDF0DF
oklch(93.6% 0.03 148.4)
-
Step 200
200
#BFE4C5
oklch(88.4% 0.057 149.8)
-
Step 300
300
#90D49C
oklch(81% 0.104 149.2)
-
Step 400
400 (this color)
#3FBB63
oklch(70.3% 0.167 149.4)
-
Step 500
500
#00A549
oklch(63.1% 0.176 149.5)
-
Step 600
600
#008B3C
oklch(55.6% 0.155 149.4)
-
Step 700
700
#007531
oklch(49.1% 0.138 149.3)
-
Step 800
800
#006027
oklch(42.7% 0.12 149.3)
-
Step 900
900
#005020
oklch(37.7% 0.105 149.6)
-
Step 950
950
#003010
oklch(27% 0.075 149.4)
#3FBB63 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) | #BCAB5C | 0.136 |
| Deuteranopia (no green cones) | #ADA169 | 0.134 |
| Tritanopia (no blue cones) | #06B8A6 | 0.092 |
| Achromatopsia (no color) | #A5A5A5 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FBB63
#3FBB63
oklch(70.3% 0.167 149.4)
- #D775D1
#D775D1
oklch(70.3% 0.167 329.4)
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 #3FBB63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.012
- Dark Mint Green #20C073 ΔE 0.020
- Dark Mint #48C072 ΔE 0.022
- Algae Green #21C36F ΔE 0.023
- Medium Sea Green #3CB371 ΔE 0.033
- Boring Green #63B365 ΔE 0.034
- Dark Pastel Green #56AE57 ΔE 0.036
- Leafy Green #51B73B ΔE 0.036
Use #3FBB63 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.