#55BBF4
Closest named color: Deep Sky Blue (#00BFFF). oklch(75.5% 0.125 236.3), rgb(85, 187, 244).
Aa
Black text reads best on this color (9.80:1).
About this color
#55BBF4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.125 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.031 away. Black text reads best on it, at 9.80:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.80:1 |
| White text | 2.14:1 |
Values
| HEX | #55BBF4 |
| RGB | rgb(85, 187, 244) |
| HSL | hsl(202, 88%, 65%) |
| OKLCH | oklch(75.5% 0.125 236.3) |
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 #55BBF4 | 2.14:1 | Fails | Lc -46.4 | Large or bold text, headings |
| Black text on #55BBF4 | 9.80:1 | AAA | Lc 62.2 | Content text, not long reading |
| #55BBF4 text on white | 2.14:1 | Fails | Lc 41.8 | Non-text elements, placeholder text |
| #55BBF4 text on black | 9.80:1 | AAA | Lc -60.4 | 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 400.
-
Step 50
50
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DCEDF7
oklch(93.6% 0.023 233.4)
-
Step 200
200
#BFDEF2
oklch(88.4% 0.043 236.3)
-
Step 300
300
#8FC9ED
oklch(80.9% 0.079 236.3)
-
Step 400
400 (this color)
#55BBF4
oklch(75.5% 0.125 236.3)
-
Step 500
500
#0094D0
oklch(63.1% 0.136 236.2)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006894
oklch(49% 0.106 236.4)
-
Step 800
800
#00557A
oklch(42.5% 0.092 236.4)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#55BBF4 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) | #A0BAF7 | 0.075 |
| Deuteranopia (no green cones) | #8AAAF3 | 0.063 |
| Tritanopia (no blue cones) | #00CACE | 0.085 |
| Achromatopsia (no color) | #B1B1B1 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55BBF4
#55BBF4
oklch(75.5% 0.125 236.3)
- #EB9A5C
#EB9A5C
oklch(75.5% 0.125 56.9)
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 #55BBF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.031
- Vivid Sky Blue #4CC9F0 ΔE 0.041
- Bright Sky Blue #02CCFE ΔE 0.048
- Lightblue #7BC8F6 ΔE 0.051
- Carolina Blue #8AB8FE ΔE 0.052
- Sky #82CAFC ΔE 0.061
- Light Sky Blue #87CEFA ΔE 0.072
- Sky Blue #87CEEB ΔE 0.076
Use #55BBF4 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.