#3FC9DA
Closest named color: Dark Turquoise (#00CED1). oklch(77% 0.117 207.1), rgb(63, 201, 218).
Aa
Black text reads best on this color (10.57:1).
About this color
#3FC9DA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.117 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.027 away. Black text reads best on it, at 10.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.57:1 |
| White text | 1.98:1 |
Values
| HEX | #3FC9DA |
| RGB | rgb(63, 201, 218) |
| HSL | hsl(187, 68%, 55%) |
| OKLCH | oklch(77% 0.117 207.1) |
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 #3FC9DA | 1.98:1 | Fails | Lc -42.4 | Non-text elements, placeholder text |
| Black text on #3FC9DA | 10.57:1 | AAA | Lc 65.9 | Content text, not long reading |
| #3FC9DA text on white | 1.98:1 | Fails | Lc 38.0 | Non-text elements, placeholder text |
| #3FC9DA text on black | 10.57:1 | AAA | Lc -64.4 | 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
#EAF9FB
oklch(97.2% 0.016 206.4)
-
Step 100
100
#D1F1F5
oklch(93.6% 0.034 205.8)
-
Step 200
200
#A7E6EF
oklch(88.6% 0.065 207.1)
-
Step 300
300 (this color)
#3FC9DA
oklch(77% 0.117 207.1)
-
Step 400
400
#00B5C7
oklch(70.7% 0.121 207.4)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008390
oklch(55.7% 0.096 207)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#3FC9DA 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) | #B8C1DB | 0.113 |
| Deuteranopia (no green cones) | #A2B1DA | 0.104 |
| Tritanopia (no blue cones) | #00D2CE | 0.038 |
| Achromatopsia (no color) | #B8B8B8 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FC9DA
#3FC9DA
oklch(77% 0.117 207.1)
- #F6978C
#F6978C
oklch(77.1% 0.116 27.2)
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 #3FC9DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.027
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Medium Turquoise #48D1CC ΔE 0.035
- Aqua Blue #02D8E9 ΔE 0.040
- Bright Sky Blue #02CCFE ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.064
- Sky Blue #87CEEB ΔE 0.065
- Deep Sky Blue #00BFFF ΔE 0.069
Use #3FC9DA 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.