#3FCA7A
Closest named color: Seaweed (#18D17B). oklch(74.6% 0.165 153.7), rgb(63, 202, 122).
Aa
Black text reads best on this color (9.94:1).
About this color
#3FCA7A is a medium-light, vivid green. In OKLCH its lightness is 75%, 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 0.022 away. Black text reads best on it, at 9.94:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.94:1 |
| White text | 2.11:1 |
Values
| HEX | #3FCA7A |
| RGB | rgb(63, 202, 122) |
| HSL | hsl(145, 57%, 52%) |
| OKLCH | oklch(74.6% 0.165 153.7) |
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 #3FCA7A | 2.11:1 | Fails | Lc -45.6 | Large or bold text, headings |
| Black text on #3FCA7A | 9.94:1 | AAA | Lc 63.0 | Content text, not long reading |
| #3FCA7A text on white | 2.11:1 | Fails | Lc 41.0 | Non-text elements, placeholder text |
| #3FCA7A text on black | 9.94:1 | 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
#BDE5C8
oklch(88.5% 0.058 153.6)
-
Step 300
300
#8AD4A2
oklch(80.8% 0.103 154)
-
Step 400
400 (this color)
#3FCA7A
oklch(74.6% 0.165 153.7)
-
Step 500
500
#00A459
oklch(63% 0.16 153.6)
-
Step 600
600
#008A4A
oklch(55.6% 0.141 153.6)
-
Step 700
700
#00743E
oklch(49% 0.124 153.9)
-
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)
#3FCA7A 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) | #CABA74 | 0.144 |
| Deuteranopia (no green cones) | #B8AD7F | 0.142 |
| Tritanopia (no blue cones) | #00C8B6 | 0.083 |
| Achromatopsia (no color) | #B2B2B2 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCA7A
#3FCA7A
oklch(74.6% 0.165 153.7)
- #E981D8
#E981D8
oklch(74.5% 0.165 333.4)
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 #3FCA7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.022
- Dark Mint #48C072 ΔE 0.027
- Algae Green #21C36F ΔE 0.027
- Dark Mint Green #20C073 ΔE 0.033
- Greenblue #23C48B ΔE 0.033
- Soft Green #6FC276 ΔE 0.037
- Green Blue #01C08D ΔE 0.047
- Emerald #06D6A0 ΔE 0.049
Use #3FCA7A 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.