#63CFE0
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79.7% 0.102 209.1), rgb(99, 207, 224).
Aa
Black text reads best on this color (11.53:1).
About this color
#63CFE0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.102 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.036 away. Black text reads best on it, at 11.53:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.53:1 |
| White text | 1.82:1 |
Values
| HEX | #63CFE0 |
| RGB | rgb(99, 207, 224) |
| HSL | hsl(188, 67%, 63%) |
| OKLCH | oklch(79.7% 0.102 209.1) |
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 #63CFE0 | 1.82:1 | Fails | Lc -37.9 | Non-text elements, placeholder text |
| Black text on #63CFE0 | 11.53:1 | AAA | Lc 70.1 | Content text, not long reading |
| #63CFE0 text on white | 1.82:1 | Fails | Lc 33.8 | Non-text elements, placeholder text |
| #63CFE0 text on black | 11.53:1 | AAA | Lc -68.8 | 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
#ECF8FA
oklch(97.1% 0.013 208.8)
-
Step 100
100
#D4F0F4
oklch(93.6% 0.03 207.1)
-
Step 200
200
#AEE4ED
oklch(88.5% 0.056 208.8)
-
Step 300
300 (this color)
#63CFE0
oklch(79.7% 0.102 209.1)
-
Step 400
400
#00B5C9
oklch(70.8% 0.122 208.7)
-
Step 500
500
#009BAD
oklch(63.1% 0.109 209.2)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006D7A
oklch(49% 0.084 209.1)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#63CFE0 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) | #BFC8E1 | 0.097 |
| Deuteranopia (no green cones) | #ACBAE0 | 0.089 |
| Tritanopia (no blue cones) | #00D7D4 | 0.048 |
| Achromatopsia (no color) | #C0C0C0 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CFE0
#63CFE0
oklch(79.7% 0.102 209.1)
- #F7A497
#F7A497
oklch(79.7% 0.101 29.3)
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 #63CFE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.036
- Sky Blue #87CEEB ΔE 0.037
- Aqua Blue #02D8E9 ΔE 0.037
- Medium Turquoise #48D1CC ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.047
- Light Sky Blue #87CEFA ΔE 0.053
- Sky #82CAFC ΔE 0.056
Use #63CFE0 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.