#3FCBB5
Closest named color: Medium Aquamarine (#66CDAA). oklch(76.3% 0.122 180.1), rgb(63, 203, 181).
Aa
Black text reads best on this color (10.42:1).
About this color
#3FCBB5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.122 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.029 away. Black text reads best on it, at 10.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.42:1 |
| White text | 2.01:1 |
Values
| HEX | #3FCBB5 |
| RGB | rgb(63, 203, 181) |
| HSL | hsl(171, 57%, 52%) |
| OKLCH | oklch(76.3% 0.122 180.1) |
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 #3FCBB5 | 2.01:1 | Fails | Lc -43.2 | Non-text elements, placeholder text |
| Black text on #3FCBB5 | 10.42:1 | AAA | Lc 65.2 | Content text, not long reading |
| #3FCBB5 text on white | 2.01:1 | Fails | Lc 38.7 | Non-text elements, placeholder text |
| #3FCBB5 text on black | 10.42:1 | AAA | Lc -63.6 | 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 300.
-
Step 50
50
#EAF9F6
oklch(97% 0.016 182.7)
-
Step 100
100
#D2F2EB
oklch(93.6% 0.035 180.9)
-
Step 200
200
#A8E8DB
oklch(88.4% 0.067 180.7)
-
Step 300
300 (this color)
#3FCBB5
oklch(76.3% 0.122 180.1)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#3FCBB5 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) | #C2BFB4 | 0.129 |
| Deuteranopia (no green cones) | #AFB1B7 | 0.122 |
| Tritanopia (no blue cones) | #00CEC4 | 0.022 |
| Achromatopsia (no color) | #B7B7B7 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCBB5
#3FCBB5
oklch(76.3% 0.122 180.1)
- #F190AE
#F190AE
oklch(76.3% 0.122 0.5)
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 #3FCBB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.029
- Medium Turquoise #48D1CC ΔE 0.034
- Dark Turquoise #00CED1 ΔE 0.039
- Seafoam Blue #78D1B6 ΔE 0.046
- Pale Teal #82CBB2 ΔE 0.050
- Topaz #13BBAF ΔE 0.051
- Emerald #06D6A0 ΔE 0.052
- Greenblue #23C48B ΔE 0.061
Use #3FCBB5 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.