#63CCFB
Closest named color: Lightblue (#7BC8F6). oklch(80.1% 0.117 229.9), rgb(99, 204, 251).
Aa
Black text reads best on this color (11.56:1).
About this color
#63CCFB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.117 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.021 away. Black text reads best on it, at 11.56:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.56:1 |
| White text | 1.81:1 |
Values
| HEX | #63CCFB |
| RGB | rgb(99, 204, 251) |
| HSL | hsl(199, 95%, 69%) |
| OKLCH | oklch(80.1% 0.117 229.9) |
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 #63CCFB | 1.81:1 | Fails | Lc -37.7 | Non-text elements, placeholder text |
| Black text on #63CCFB | 11.56:1 | AAA | Lc 70.2 | Content text, not long reading |
| #63CCFB text on white | 1.81:1 | Fails | Lc 33.6 | Non-text elements, placeholder text |
| #63CCFB text on black | 11.56:1 | AAA | Lc -69.0 | 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
#D4EFFD
oklch(93.7% 0.034 230.2)
-
Step 200
200
#ADE2FC
oklch(88.5% 0.065 229.5)
-
Step 300
300 (this color)
#63CCFB
oklch(80.1% 0.117 229.9)
-
Step 400
400
#00AFE7
oklch(70.6% 0.141 230.3)
-
Step 500
500
#0096C6
oklch(63% 0.126 229.9)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#63CCFB 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) | #B4C9FD | 0.082 |
| Deuteranopia (no green cones) | #9FB9FA | 0.072 |
| Tritanopia (no blue cones) | #00D9DB | 0.077 |
| Achromatopsia (no color) | #C0C0C0 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CCFB
#63CCFB
oklch(80.1% 0.117 229.9)
- #FBA778
#FBA778
oklch(80.1% 0.117 49.7)
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 #63CCFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.021
- Vivid Sky Blue #4CC9F0 ΔE 0.025
- Sky #82CAFC ΔE 0.027
- Light Sky Blue #87CEFA ΔE 0.033
- Bright Sky Blue #02CCFE ΔE 0.036
- Sky Blue #87CEEB ΔE 0.039
- Deep Sky Blue #00BFFF ΔE 0.058
- Aqua Blue #02D8E9 ΔE 0.059
Use #63CCFB 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.