#3FB583
Closest named color: Dark Seafoam (#1FB57A). oklch(69.4% 0.129 161.6), rgb(63, 181, 131).
Aa
Black text reads best on this color (8.14:1).
About this color
#3FB583 is a medium-light, moderately saturated green. In OKLCH its lightness is 69%, its chroma 0.129 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.021 away. Black text reads best on it, at 8.14:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.14:1 |
| White text | 2.57:1 |
Values
| HEX | #3FB583 |
| RGB | rgb(63, 181, 131) |
| HSL | hsl(155, 48%, 48%) |
| OKLCH | oklch(69.4% 0.129 161.6) |
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 #3FB583 | 2.57:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #3FB583 | 8.14:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #3FB583 text on white | 2.57:1 | Fails | Lc 50.1 | Large or bold text, headings |
| #3FB583 text on black | 8.14:1 | AAA | Lc -51.9 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DDEFE5
oklch(93.6% 0.023 161.7)
-
Step 200
200
#C0E3D0
oklch(88.5% 0.045 161.6)
-
Step 300
300
#91D1B0
oklch(80.8% 0.08 161.4)
-
Step 400
400 (this color)
#3FB583
oklch(69.4% 0.129 161.6)
-
Step 500
500
#00A36E
oklch(63.2% 0.14 161.4)
-
Step 600
600
#00895C
oklch(55.7% 0.123 161.5)
-
Step 700
700
#00734D
oklch(49.1% 0.108 161.8)
-
Step 800
800
#005E3E
oklch(42.6% 0.094 161.6)
-
Step 900
900
#004F33
oklch(37.8% 0.084 161.3)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#3FB583 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) | #B2A880 | 0.123 |
| Deuteranopia (no green cones) | #A39D86 | 0.120 |
| Tritanopia (no blue cones) | #00B5A7 | 0.052 |
| Achromatopsia (no color) | #A1A1A1 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB583
#3FB583
oklch(69.4% 0.129 161.6)
- #D27BB4
#D27BB4
oklch(69.5% 0.129 341.3)
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 #3FB583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.021
- Bluey Green #2BB179 ΔE 0.021
- Dark Seafoam Green #3EAF76 ΔE 0.021
- Medium Sea Green #3CB371 ΔE 0.024
- Green Teal #0CB577 ΔE 0.027
- Greeny Blue #42B395 ΔE 0.028
- Green Blue #01C08D ΔE 0.031
- Tea #65AB7C ΔE 0.036
Use #3FB583 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.