#63C1FC
Closest named color: Lightblue (#7BC8F6). oklch(77.7% 0.123 238.7), rgb(99, 193, 252).
Aa
Black text reads best on this color (10.56:1).
About this color
#63C1FC is a medium-light, moderately saturated blue. In OKLCH its lightness is 78%, its chroma 0.123 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.033 away. Black text reads best on it, at 10.56:1.
| Hue family | Blues |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 10.56:1 |
| White text | 1.98:1 |
Values
| HEX | #63C1FC |
| RGB | rgb(99, 193, 252) |
| HSL | hsl(203, 96%, 69%) |
| OKLCH | oklch(77.7% 0.123 238.7) |
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 #63C1FC | 1.98:1 | Fails | Lc -42.6 | Non-text elements, placeholder text |
| Black text on #63C1FC | 10.56:1 | AAA | Lc 65.7 | Content text, not long reading |
| #63C1FC text on white | 1.98:1 | Fails | Lc 38.2 | Non-text elements, placeholder text |
| #63C1FC text on black | 10.56:1 | AAA | Lc -64.2 | 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
#ECF7FF
oklch(97% 0.016 239.1)
-
Step 100
100
#D6EEFF
oklch(93.7% 0.034 238.7)
-
Step 200
200
#B3E0FF
oklch(88.5% 0.064 238.5)
-
Step 300
300 (this color)
#63C1FC
oklch(77.7% 0.123 238.7)
-
Step 400
400
#00ACF7
oklch(70.7% 0.158 238.5)
-
Step 500
500
#0093D5
oklch(63.1% 0.142 238.9)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#63C1FC 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) | #A6C0FF | 0.069 |
| Deuteranopia (no green cones) | #91B1FB | 0.058 |
| Tritanopia (no blue cones) | #00D0D5 | 0.089 |
| Achromatopsia (no color) | #B8B8B8 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63C1FC
#63C1FC
oklch(77.7% 0.123 238.7)
- #F1A262
#F1A262
oklch(77.7% 0.124 58.6)
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 #63C1FC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.033
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Sky #82CAFC ΔE 0.040
- Deep Sky Blue #00BFFF ΔE 0.041
- Carolina Blue #8AB8FE ΔE 0.042
- Bright Sky Blue #02CCFE ΔE 0.043
- Light Sky Blue #87CEFA ΔE 0.052
- Sky Blue #87CEEB ΔE 0.060
Use #63C1FC 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.