#55D3EE
Closest named color: Aqua Blue (#02D8E9). oklch(80.7% 0.116 214.5), rgb(85, 211, 238).
Aa
Black text reads best on this color (11.93:1).
About this color
#55D3EE is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.116 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.030 away. Black text reads best on it, at 11.93:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.93:1 |
| White text | 1.75:1 |
Values
| HEX | #55D3EE |
| RGB | rgb(85, 211, 238) |
| HSL | hsl(191, 82%, 63%) |
| OKLCH | oklch(80.7% 0.116 214.5) |
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 #55D3EE | 1.75:1 | Fails | Lc -35.8 | Non-text elements, placeholder text |
| Black text on #55D3EE | 11.93:1 | AAA | Lc 72.0 | Content text, not long reading |
| #55D3EE text on white | 1.75:1 | Fails | Lc 31.9 | Non-text elements, placeholder text |
| #55D3EE text on black | 11.93:1 | AAA | Lc -70.8 | 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
#EAF8FC
oklch(97% 0.016 216.7)
-
Step 100
100
#D2F0F8
oklch(93.6% 0.033 215.6)
-
Step 200
200
#A8E5F3
oklch(88.5% 0.064 213.4)
-
Step 300
300 (this color)
#55D3EE
oklch(80.7% 0.116 214.5)
-
Step 400
400
#00B4D0
oklch(70.8% 0.124 214)
-
Step 500
500
#009AB3
oklch(63.1% 0.111 214.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#55D3EE 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) | #C0CDF0 | 0.105 |
| Deuteranopia (no green cones) | #A9BCEE | 0.094 |
| Tritanopia (no blue cones) | #00DDDB | 0.052 |
| Achromatopsia (no color) | #C3C3C3 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55D3EE
#55D3EE
oklch(80.7% 0.116 214.5)
- #FFA690
#FFA690
oklch(80.8% 0.111 34.6)
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 #55D3EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.030
- Vivid Sky Blue #4CC9F0 ΔE 0.030
- Sky Blue #87CEEB ΔE 0.040
- Bright Sky Blue #02CCFE ΔE 0.044
- Lightblue #7BC8F6 ΔE 0.044
- Light Sky Blue #87CEFA ΔE 0.048
- Sky #82CAFC ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.050
Use #55D3EE 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.