#3FCA7C
Closest named color: Seaweed (#18D17B). oklch(74.6% 0.164 154.3), rgb(63, 202, 124).
Aa
Black text reads best on this color (9.95:1).
About this color
#3FCA7C is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.164 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.023 away. Black text reads best on it, at 9.95:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.95:1 |
| White text | 2.11:1 |
Values
| HEX | #3FCA7C |
| RGB | rgb(63, 202, 124) |
| HSL | hsl(146, 57%, 52%) |
| OKLCH | oklch(74.6% 0.164 154.3) |
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 #3FCA7C | 2.11:1 | Fails | Lc -45.5 | Large or bold text, headings |
| Black text on #3FCA7C | 9.95:1 | AAA | Lc 63.0 | Content text, not long reading |
| #3FCA7C text on white | 2.11:1 | Fails | Lc 40.9 | Non-text elements, placeholder text |
| #3FCA7C text on black | 9.95:1 | AAA | Lc -61.3 | 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
#DBF0E1
oklch(93.6% 0.03 154.7)
-
Step 200
200
#BDE5C9
oklch(88.6% 0.057 154.6)
-
Step 300
300
#8AD4A3
oklch(80.8% 0.102 154.5)
-
Step 400
400 (this color)
#3FCA7C
oklch(74.6% 0.164 154.3)
-
Step 500
500
#00A45B
oklch(63.1% 0.158 154.2)
-
Step 600
600
#008A4C
oklch(55.6% 0.139 154.3)
-
Step 700
700
#00743F
oklch(49.1% 0.123 154.3)
-
Step 800
800
#005F33
oklch(42.6% 0.106 154.6)
-
Step 900
900
#005029
oklch(37.8% 0.096 153.9)
-
Step 950
950
#003016
oklch(27.1% 0.069 153.7)
#3FCA7C 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) | #CABA77 | 0.145 |
| Deuteranopia (no green cones) | #B8AE81 | 0.140 |
| Tritanopia (no blue cones) | #00C8B6 | 0.081 |
| Achromatopsia (no color) | #B2B2B2 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCA7C
#3FCA7C
oklch(74.6% 0.164 154.3)
- #EA82D7
#EA82D7
oklch(74.7% 0.164 334.2)
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 #3FCA7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.023
- Dark Mint #48C072 ΔE 0.027
- Algae Green #21C36F ΔE 0.028
- Greenblue #23C48B ΔE 0.032
- Dark Mint Green #20C073 ΔE 0.034
- Soft Green #6FC276 ΔE 0.036
- Green Blue #01C08D ΔE 0.045
- Emerald #06D6A0 ΔE 0.047
Use #3FCA7C 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.