#3FC979
Closest named color: Seaweed (#18D17B). oklch(74.3% 0.165 153.6), rgb(63, 201, 121).
Aa
Black text reads best on this color (9.84:1).
About this color
#3FC979 is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.165 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.024 away. Black text reads best on it, at 9.84:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.84:1 |
| White text | 2.13:1 |
Values
| HEX | #3FC979 |
| RGB | rgb(63, 201, 121) |
| HSL | hsl(145, 56%, 52%) |
| OKLCH | oklch(74.3% 0.165 153.6) |
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 #3FC979 | 2.13:1 | Fails | Lc -46.1 | Large or bold text, headings |
| Black text on #3FC979 | 9.84:1 | AAA | Lc 62.5 | Content text, not long reading |
| #3FC979 text on white | 2.13:1 | Fails | Lc 41.4 | Non-text elements, placeholder text |
| #3FC979 text on black | 9.84:1 | AAA | Lc -60.8 | Content text, not long reading |
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
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DCF0E1
oklch(93.6% 0.029 153.3)
-
Step 200
200
#BDE5C8
oklch(88.5% 0.058 153.6)
-
Step 300
300
#8BD4A2
oklch(80.8% 0.102 153.7)
-
Step 400
400 (this color)
#3FC979
oklch(74.3% 0.165 153.6)
-
Step 500
500
#00A459
oklch(63% 0.16 153.6)
-
Step 600
600
#008A4A
oklch(55.6% 0.141 153.6)
-
Step 700
700
#00743D
oklch(49% 0.125 153.5)
-
Step 800
800
#005F31
oklch(42.6% 0.108 153.6)
-
Step 900
900
#005028
oklch(37.8% 0.097 153.4)
-
Step 950
950
#003016
oklch(27.1% 0.069 153.7)
#3FC979 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) | #C9B973 | 0.144 |
| Deuteranopia (no green cones) | #B8AD7E | 0.141 |
| Tritanopia (no blue cones) | #00C7B5 | 0.083 |
| Achromatopsia (no color) | #B1B1B1 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FC979
#3FC979
oklch(74.3% 0.165 153.6)
- #E880D7
#E880D7
oklch(74.2% 0.165 333.5)
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 #3FC979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.024
- Dark Mint #48C072 ΔE 0.024
- Algae Green #21C36F ΔE 0.025
- Dark Mint Green #20C073 ΔE 0.031
- Greenblue #23C48B ΔE 0.032
- Soft Green #6FC276 ΔE 0.036
- Green Blue #01C08D ΔE 0.045
- Emerald #06D6A0 ΔE 0.051
Use #3FC979 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.