#63CDEB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79.7% 0.106 219), rgb(99, 205, 235).
Aa
Black text reads best on this color (11.46:1).
About this color
#63CDEB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.106 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.022 away. Black text reads best on it, at 11.46:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.46:1 |
| White text | 1.83:1 |
Values
| HEX | #63CDEB |
| RGB | rgb(99, 205, 235) |
| HSL | hsl(193, 77%, 65%) |
| OKLCH | oklch(79.7% 0.106 219) |
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 #63CDEB | 1.83:1 | Fails | Lc -38.2 | Non-text elements, placeholder text |
| Black text on #63CDEB | 11.46:1 | AAA | Lc 69.8 | Content text, not long reading |
| #63CDEB text on white | 1.83:1 | Fails | Lc 34.1 | Non-text elements, placeholder text |
| #63CDEB text on black | 11.46:1 | AAA | Lc -68.5 | 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
#ECF8FC
oklch(97.1% 0.014 219.6)
-
Step 100
100
#D4EFF8
oklch(93.5% 0.031 219.8)
-
Step 200
200
#AEE3F4
oklch(88.5% 0.059 219.5)
-
Step 300
300 (this color)
#63CDEB
oklch(79.7% 0.106 219)
-
Step 400
400
#00B2D6
oklch(70.6% 0.128 219.2)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#63CDEB 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) | #BAC8ED | 0.090 |
| Deuteranopia (no green cones) | #A6B9EB | 0.081 |
| Tritanopia (no blue cones) | #00D7D6 | 0.060 |
| Achromatopsia (no color) | #BFBFBF | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CDEB
#63CDEB
oklch(79.7% 0.106 219)
- #F8A58A
#F8A58A
oklch(79.7% 0.106 38.8)
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 #63CDEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.022
- Lightblue #7BC8F6 ΔE 0.031
- Sky Blue #87CEEB ΔE 0.032
- Sky #82CAFC ΔE 0.040
- Light Sky Blue #87CEFA ΔE 0.041
- Aqua Blue #02D8E9 ΔE 0.044
- Bright Sky Blue #02CCFE ΔE 0.044
- Medium Turquoise #48D1CC ΔE 0.055
Use #63CDEB 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.