#55C4FF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78% 0.131 235.3), rgb(85, 196, 255).
Aa
Black text reads best on this color (10.72:1).
About this color
#55C4FF is a light, moderately saturated blue. In OKLCH its lightness is 78%, its chroma 0.131 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.030 away. Black text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.72:1 |
| White text | 1.95:1 |
Values
| HEX | #55C4FF |
| RGB | rgb(85, 196, 255) |
| HSL | hsl(201, 100%, 67%) |
| OKLCH | oklch(78% 0.131 235.3) |
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 #55C4FF | 1.95:1 | Fails | Lc -41.7 | Non-text elements, placeholder text |
| Black text on #55C4FF | 10.72:1 | AAA | Lc 66.5 | Content text, not long reading |
| #55C4FF text on white | 1.95:1 | Fails | Lc 37.4 | Non-text elements, placeholder text |
| #55C4FF text on black | 10.72:1 | AAA | Lc -65.1 | 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
#ECF8FF
oklch(97.2% 0.016 233)
-
Step 100
100
#D4EEFF
oklch(93.5% 0.036 236.5)
-
Step 200
200
#AFE1FF
oklch(88.5% 0.066 234.8)
-
Step 300
300 (this color)
#55C4FF
oklch(78% 0.131 235.3)
-
Step 400
400
#00ADF0
oklch(70.6% 0.15 235.3)
-
Step 500
500
#0094CF
oklch(63% 0.135 235.8)
-
Step 600
600
#007DAE
oklch(55.7% 0.118 234.9)
-
Step 700
700
#006993
oklch(49.2% 0.104 234.9)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#55C4FF 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) | #A8C3FF | 0.080 |
| Deuteranopia (no green cones) | #90B2FE | 0.067 |
| Tritanopia (no blue cones) | #00D3D8 | 0.085 |
| Achromatopsia (no color) | #B9B9B9 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55C4FF
#55C4FF
oklch(78% 0.131 235.3)
- #F7A061
#F7A061
oklch(78.1% 0.13 55.4)
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 #55C4FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.030
- Bright Sky Blue #02CCFE ΔE 0.032
- Deep Sky Blue #00BFFF ΔE 0.035
- Lightblue #7BC8F6 ΔE 0.036
- Sky #82CAFC ΔE 0.043
- Carolina Blue #8AB8FE ΔE 0.053
- Light Sky Blue #87CEFA ΔE 0.054
- Sky Blue #87CEEB ΔE 0.062
Use #55C4FF 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.