#3FCBE5
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.9% 0.121 212.9), rgb(63, 203, 229).
Aa
Black text reads best on this color (10.88:1).
About this color
#3FCBE5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.121 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.020 away. Black text reads best on it, at 10.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.88:1 |
| White text | 1.92:1 |
Values
| HEX | #3FCBE5 |
| RGB | rgb(63, 203, 229) |
| HSL | hsl(189, 76%, 57%) |
| OKLCH | oklch(77.9% 0.121 212.9) |
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 #3FCBE5 | 1.92:1 | Fails | Lc -40.9 | Non-text elements, placeholder text |
| Black text on #3FCBE5 | 10.88:1 | AAA | Lc 67.3 | Content text, not long reading |
| #3FCBE5 text on white | 1.92:1 | Fails | Lc 36.6 | Non-text elements, placeholder text |
| #3FCBE5 text on black | 10.88:1 | AAA | Lc -65.9 | 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
#EAF9FC
oklch(97.2% 0.016 211)
-
Step 100
100
#D0F1F8
oklch(93.7% 0.036 211.9)
-
Step 200
200
#A5E5F4
oklch(88.4% 0.067 213.8)
-
Step 300
300 (this color)
#3FCBE5
oklch(77.9% 0.121 212.9)
-
Step 400
400
#00B4CE
oklch(70.7% 0.124 212.8)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#3FCBE5 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) | #B7C4E7 | 0.110 |
| Deuteranopia (no green cones) | #A0B3E5 | 0.100 |
| Tritanopia (no blue cones) | #00D5D3 | 0.046 |
| Achromatopsia (no color) | #BBBBBB | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCBE5
#3FCBE5
oklch(77.9% 0.121 212.9)
- #FA9A85
#FA9A85
oklch(78% 0.12 33.1)
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 #3FCBE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.020
- Aqua Blue #02D8E9 ΔE 0.035
- Bright Sky Blue #02CCFE ΔE 0.037
- Dark Turquoise #00CED1 ΔE 0.038
- Medium Turquoise #48D1CC ΔE 0.045
- Lightblue #7BC8F6 ΔE 0.053
- Sky Blue #87CEEB ΔE 0.057
- Deep Sky Blue #00BFFF ΔE 0.060
Use #3FCBE5 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.