#63CAFD
Closest named color: Lightblue (#7BC8F6). oklch(79.8% 0.12 232.6), rgb(99, 202, 253).
Aa
Black text reads best on this color (11.39:1).
About this color
#63CAFD is a light, moderately saturated blue. In OKLCH its lightness is 80%, its chroma 0.120 and its hue 233°. 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 11.39:1.
| Hue family | Blues |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.39:1 |
| White text | 1.84:1 |
Values
| HEX | #63CAFD |
| RGB | rgb(99, 202, 253) |
| HSL | hsl(200, 97%, 69%) |
| OKLCH | oklch(79.8% 0.12 232.6) |
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 #63CAFD | 1.84:1 | Fails | Lc -38.5 | Non-text elements, placeholder text |
| Black text on #63CAFD | 11.39:1 | AAA | Lc 69.5 | Content text, not long reading |
| #63CAFD text on white | 1.84:1 | Fails | Lc 34.4 | Non-text elements, placeholder text |
| #63CAFD text on black | 11.39:1 | AAA | Lc -68.2 | 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
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D4EFFE
oklch(93.7% 0.035 232)
-
Step 200
200
#AEE2FE
oklch(88.6% 0.066 232)
-
Step 300
300 (this color)
#63CAFD
oklch(79.8% 0.12 232.6)
-
Step 400
400
#00AEEB
oklch(70.6% 0.145 232.7)
-
Step 500
500
#0095CA
oklch(63% 0.13 232.7)
-
Step 600
600
#007EAB
oklch(55.7% 0.114 232.4)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#63CAFD 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) | #B1C8FF | 0.079 |
| Deuteranopia (no green cones) | #9CB8FC | 0.068 |
| Tritanopia (no blue cones) | #00D8DB | 0.081 |
| Achromatopsia (no color) | #BFBFBF | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CAFD
#63CAFD
oklch(79.8% 0.12 232.6)
- #FAA772
#FAA772
oklch(79.9% 0.12 52.8)
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 #63CAFD, 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 0.026
- Sky #82CAFC ΔE 0.027
- Light Sky Blue #87CEFA ΔE 0.035
- Bright Sky Blue #02CCFE ΔE 0.036
- Sky Blue #87CEEB ΔE 0.043
- Deep Sky Blue #00BFFF ΔE 0.054
- Carolina Blue #8AB8FE ΔE 0.057
Use #63CAFD 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.