#55C3EF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.1% 0.118 227.7), rgb(85, 195, 239).
Aa
Black text reads best on this color (10.43:1).
About this color
#55C3EF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.118 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.016 away. Black text reads best on it, at 10.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.43:1 |
| White text | 2.01:1 |
Values
| HEX | #55C3EF |
| RGB | rgb(85, 195, 239) |
| HSL | hsl(197, 83%, 64%) |
| OKLCH | oklch(77.1% 0.118 227.7) |
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 #55C3EF | 2.01:1 | Fails | Lc -43.2 | Non-text elements, placeholder text |
| Black text on #55C3EF | 10.43:1 | AAA | Lc 65.2 | Content text, not long reading |
| #55C3EF text on white | 2.01:1 | Fails | Lc 38.7 | Non-text elements, placeholder text |
| #55C3EF text on black | 10.43:1 | 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
#EBF8FE
oklch(97.1% 0.016 227)
-
Step 100
100
#D3EFFC
oklch(93.6% 0.034 227.4)
-
Step 200
200
#ACE2FB
oklch(88.4% 0.065 228.1)
-
Step 300
300 (this color)
#55C3EF
oklch(77.1% 0.118 227.7)
-
Step 400
400
#00B0E3
oklch(70.7% 0.137 227.7)
-
Step 500
500
#0097C3
oklch(63.1% 0.123 227.5)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#55C3EF 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) | #ACC0F1 | 0.086 |
| Deuteranopia (no green cones) | #96B0EE | 0.075 |
| Tritanopia (no blue cones) | #00D0D1 | 0.071 |
| Achromatopsia (no color) | #B7B7B7 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55C3EF
#55C3EF
oklch(77.1% 0.118 227.7)
- #F29D71
#F29D71
oklch(77.2% 0.118 47.8)
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 #55C3EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.016
- Bright Sky Blue #02CCFE ΔE 0.034
- Lightblue #7BC8F6 ΔE 0.037
- Deep Sky Blue #00BFFF ΔE 0.040
- Sky #82CAFC ΔE 0.049
- Sky Blue #87CEEB ΔE 0.057
- Light Sky Blue #87CEFA ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.062
Use #55C3EF 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.