#3FCD8A
Closest named color: Seaweed (#18D17B). oklch(75.7% 0.155 158.3), rgb(63, 205, 138).
Aa
Black text reads best on this color (10.31:1).
About this color
#3FCD8A is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.155 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.029 away. Black text reads best on it, at 10.31:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.155) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.31:1 |
| White text | 2.03:1 |
Values
| HEX | #3FCD8A |
| RGB | rgb(63, 205, 138) |
| HSL | hsl(152, 59%, 53%) |
| OKLCH | oklch(75.7% 0.155 158.3) |
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 #3FCD8A | 2.03:1 | Fails | Lc -43.7 | Non-text elements, placeholder text |
| Black text on #3FCD8A | 10.31:1 | AAA | Lc 64.7 | Content text, not long reading |
| #3FCD8A text on white | 2.03:1 | Fails | Lc 39.2 | Non-text elements, placeholder text |
| #3FCD8A text on black | 10.31:1 | AAA | Lc -63.1 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DBF0E3
oklch(93.6% 0.028 158.7)
-
Step 200
200
#BCE5CC
oklch(88.6% 0.055 158.3)
-
Step 300
300
#89D4A9
oklch(80.9% 0.097 158.2)
-
Step 400
400 (this color)
#3FCD8A
oklch(75.7% 0.155 158.3)
-
Step 500
500
#00A367
oklch(63% 0.146 158.5)
-
Step 600
600
#008955
oklch(55.5% 0.129 158.2)
-
Step 700
700
#007447
oklch(49.2% 0.115 158)
-
Step 800
800
#005F3A
oklch(42.8% 0.099 158.5)
-
Step 900
900
#004F2F
oklch(37.7% 0.088 158.2)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#3FCD8A 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) | #CBBD86 | 0.143 |
| Deuteranopia (no green cones) | #B9B08E | 0.140 |
| Tritanopia (no blue cones) | #00CCBB | 0.068 |
| Achromatopsia (no color) | #B6B6B6 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCD8A
#3FCD8A
oklch(75.7% 0.155 158.3)
- #EE87D1
#EE87D1
oklch(75.7% 0.154 338.5)
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 #3FCD8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.029
- Greenblue #23C48B ΔE 0.031
- Emerald #06D6A0 ΔE 0.031
- Dark Mint #48C072 ΔE 0.040
- Soft Green #6FC276 ΔE 0.040
- Algae Green #21C36F ΔE 0.044
- Green Blue #01C08D ΔE 0.045
- Dark Mint Green #20C073 ΔE 0.046
Use #3FCD8A 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.