#3FCBC9
Closest named color: Dark Turquoise (#00CED1). oklch(76.9% 0.116 193.6), rgb(63, 203, 201).
Aa
Black text reads best on this color (10.59:1).
About this color
#3FCBC9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.116 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.017 away. Black text reads best on it, at 10.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.59:1 |
| White text | 1.98:1 |
Values
| HEX | #3FCBC9 |
| RGB | rgb(63, 203, 201) |
| HSL | hsl(179, 57%, 52%) |
| OKLCH | oklch(76.9% 0.116 193.6) |
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 #3FCBC9 | 1.98:1 | Fails | Lc -42.3 | Non-text elements, placeholder text |
| Black text on #3FCBC9 | 10.59:1 | AAA | Lc 66.0 | Content text, not long reading |
| #3FCBC9 text on white | 1.98:1 | Fails | Lc 37.9 | Non-text elements, placeholder text |
| #3FCBC9 text on black | 10.59:1 | AAA | Lc -64.5 | 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
#EAF9F8
oklch(97.1% 0.016 192.1)
-
Step 100
100
#D1F1F0
oklch(93.5% 0.033 194.3)
-
Step 200
200
#A7E7E5
oklch(88.5% 0.064 193.6)
-
Step 300
300 (this color)
#3FCBC9
oklch(76.9% 0.116 193.6)
-
Step 400
400
#00B8B6
oklch(70.8% 0.121 193.4)
-
Step 500
500
#009D9C
oklch(63% 0.108 194)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#3FCBC9 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) | #BEC1C9 | 0.121 |
| Deuteranopia (no green cones) | #A9B2CA | 0.113 |
| Tritanopia (no blue cones) | #00D1CA | 0.020 |
| Achromatopsia (no color) | #B8B8B8 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCBC9
#3FCBC9
oklch(76.9% 0.116 193.6)
- #F4949E
#F4949E
oklch(76.8% 0.116 13.4)
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 #3FCBC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.017
- Medium Turquoise #48D1CC ΔE 0.018
- Aqua Blue #02D8E9 ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.050
- Seafoam Blue #78D1B6 ΔE 0.053
- Pale Teal #82CBB2 ΔE 0.055
- Topaz #13BBAF ΔE 0.057
- Turquoise #40E0D0 ΔE 0.058
Use #3FCBC9 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.