#63CEE5
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79.7% 0.103 213.8), rgb(99, 206, 229).
Aa
Black text reads best on this color (11.49:1).
About this color
#63CEE5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.103 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.029 away. Black text reads best on it, at 11.49:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.49:1 |
| White text | 1.82:1 |
Values
| HEX | #63CEE5 |
| RGB | rgb(99, 206, 229) |
| HSL | hsl(191, 71%, 64%) |
| OKLCH | oklch(79.7% 0.103 213.8) |
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 #63CEE5 | 1.82:1 | Fails | Lc -38.1 | Non-text elements, placeholder text |
| Black text on #63CEE5 | 11.49:1 | AAA | Lc 69.9 | Content text, not long reading |
| #63CEE5 text on white | 1.82:1 | Fails | Lc 34.0 | Non-text elements, placeholder text |
| #63CEE5 text on black | 11.49:1 | AAA | Lc -68.6 | 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
#ECF8FB
oklch(97.1% 0.013 214.4)
-
Step 100
100
#D4F0F6
oklch(93.7% 0.03 212)
-
Step 200
200
#AEE4F0
oklch(88.6% 0.058 212.8)
-
Step 300
300 (this color)
#63CEE5
oklch(79.7% 0.103 213.8)
-
Step 400
400
#00B4CF
oklch(70.8% 0.124 213.4)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008196
oklch(55.5% 0.098 214.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#63CEE5 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) | #BDC8E6 | 0.094 |
| Deuteranopia (no green cones) | #A9B9E5 | 0.086 |
| Tritanopia (no blue cones) | #00D7D5 | 0.053 |
| Achromatopsia (no color) | #C0C0C0 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CEE5
#63CEE5
oklch(79.7% 0.103 213.8)
- #F7A491
#F7A491
oklch(79.6% 0.103 33.5)
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 #63CEE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Sky Blue #87CEEB ΔE 0.034
- Aqua Blue #02D8E9 ΔE 0.040
- Lightblue #7BC8F6 ΔE 0.040
- Medium Turquoise #48D1CC ΔE 0.045
- Light Sky Blue #87CEFA ΔE 0.047
- Sky #82CAFC ΔE 0.048
- Bright Sky Blue #02CCFE ΔE 0.050
Use #63CEE5 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.