#63CDFF
Closest named color: Lightblue (#7BC8F6). oklch(80.5% 0.12 231.4), rgb(99, 205, 255).
Aa
Black text reads best on this color (11.70:1).
About this color
#63CDFF is a light, moderately saturated blue. In OKLCH its lightness is 81%, its chroma 0.120 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.023 away. Black text reads best on it, at 11.70:1.
| Hue family | Blues |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.70:1 |
| White text | 1.79:1 |
Values
| HEX | #63CDFF |
| RGB | rgb(99, 205, 255) |
| HSL | hsl(199, 100%, 69%) |
| OKLCH | oklch(80.5% 0.12 231.4) |
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 #63CDFF | 1.79:1 | Fails | Lc -37.0 | Non-text elements, placeholder text |
| Black text on #63CDFF | 11.70:1 | AAA | Lc 70.9 | Content text, not long reading |
| #63CDFF text on white | 1.79:1 | Fails | Lc 33.0 | Non-text elements, placeholder text |
| #63CDFF text on black | 11.70:1 | AAA | Lc -69.7 | 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
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D4EFFD
oklch(93.7% 0.034 230.2)
-
Step 200
200
#ADE2FE
oklch(88.6% 0.067 231.5)
-
Step 300
300 (this color)
#63CDFF
oklch(80.5% 0.12 231.4)
-
Step 400
400
#00AFE9
oklch(70.7% 0.143 231.2)
-
Step 500
500
#0096C8
oklch(63.1% 0.127 231)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005776
oklch(42.8% 0.087 231.2)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#63CDFF 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) | #B4CAFF | 0.081 |
| Deuteranopia (no green cones) | #9EBAFE | 0.071 |
| Tritanopia (no blue cones) | #00DBDD | 0.080 |
| Achromatopsia (no color) | #C1C1C1 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CDFF
#63CDFF
oklch(80.5% 0.12 231.4)
- #FDA875
#FDA875
oklch(80.4% 0.121 51.3)
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 #63CDFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.023
- Sky #82CAFC ΔE 0.026
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Light Sky Blue #87CEFA ΔE 0.032
- Bright Sky Blue #02CCFE ΔE 0.038
- Sky Blue #87CEEB ΔE 0.041
- Deep Sky Blue #00BFFF ΔE 0.060
- Baby Blue #A2CFFE ΔE 0.061
Use #63CDFF 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.