#3FB171
Closest named color: Medium Sea Green (#3CB371). oklch(68% 0.14 155), rgb(63, 177, 113).
Aa
Black text reads best on this color (7.73:1).
About this color
#3FB171 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.140 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Sea Green (#3CB371), ΔE 0.006 away. Black text reads best on it, at 7.73:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Medium Sea Green (#3CB371) |
| Black text | 7.73:1 |
| White text | 2.71:1 |
Values
| HEX | #3FB171 |
| RGB | rgb(63, 177, 113) |
| HSL | hsl(146, 48%, 47%) |
| OKLCH | oklch(68% 0.14 155) |
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 #3FB171 | 2.71:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #3FB171 | 7.73:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #3FB171 text on white | 2.71:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #3FB171 text on black | 7.73:1 | AAA | Lc -49.6 | 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
#F0F8F2
oklch(97.1% 0.012 153.7)
-
Step 100
100
#DDEFE3
oklch(93.5% 0.025 156.7)
-
Step 200
200
#C1E3CB
oklch(88.5% 0.048 154.6)
-
Step 300
300
#93D2A8
oklch(81% 0.088 154.8)
-
Step 400
400 (this color)
#3FB171
oklch(68% 0.14 155)
-
Step 500
500
#00A45E
oklch(63.1% 0.156 155.1)
-
Step 600
600
#008A4E
oklch(55.6% 0.137 155)
-
Step 700
700
#007441
oklch(49.1% 0.121 155.2)
-
Step 800
800
#005F34
oklch(42.6% 0.105 155.1)
-
Step 900
900
#004F2B
oklch(37.6% 0.092 155.5)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#3FB171 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) | #B0A36D | 0.125 |
| Deuteranopia (no green cones) | #A29975 | 0.122 |
| Tritanopia (no blue cones) | #00AFA1 | 0.070 |
| Achromatopsia (no color) | #9D9D9D | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB171
#3FB171
oklch(68% 0.14 155)
- #CC74BA
#CC74BA
oklch(67.9% 0.141 335)
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 #3FB171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Sea Green #3CB371 ΔE 0.006
- Dark Seafoam Green #3EAF76 ΔE 0.010
- Bluey Green #2BB179 ΔE 0.013
- Seaweed Green #35AD6B ΔE 0.015
- Jade Green #2BAF6A ΔE 0.016
- Dark Seafoam #1FB57A ΔE 0.016
- Algae #54AC68 ΔE 0.018
- Green Teal #0CB577 ΔE 0.018
Use #3FB171 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.