#63D3EC
Closest named color: Sky Blue (#87CEEB). oklch(81.1% 0.107 214.6), rgb(99, 211, 236).
Aa
Black text reads best on this color (12.05:1).
About this color
#63D3EC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.107 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Sky Blue (#87CEEB), ΔE 0.032 away. Black text reads best on it, at 12.05:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Sky Blue (#87CEEB) |
| Black text | 12.05:1 |
| White text | 1.74:1 |
Values
| HEX | #63D3EC |
| RGB | rgb(99, 211, 236) |
| HSL | hsl(191, 78%, 66%) |
| OKLCH | oklch(81.1% 0.107 214.6) |
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 #63D3EC | 1.74:1 | Fails | Lc -35.3 | Non-text elements, placeholder text |
| Black text on #63D3EC | 12.05:1 | AAA | Lc 72.4 | Content text, not long reading |
| #63D3EC text on white | 1.74:1 | Fails | Lc 31.4 | Non-text elements, placeholder text |
| #63D3EC text on black | 12.05:1 | AAA | Lc -71.3 | 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
#EBF8FB
oklch(97% 0.014 213.1)
-
Step 100
100
#D4F0F7
oklch(93.7% 0.031 214.5)
-
Step 200
200
#ACE4F2
oklch(88.5% 0.06 214.8)
-
Step 300
300 (this color)
#63D3EC
oklch(81.1% 0.107 214.6)
-
Step 400
400
#00B4D0
oklch(70.8% 0.124 214)
-
Step 500
500
#009AB3
oklch(63.1% 0.111 214.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
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
#002C35
oklch(27% 0.048 215.4)
#63D3EC 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) | #C1CDED | 0.097 |
| Deuteranopia (no green cones) | #ADBEEC | 0.088 |
| Tritanopia (no blue cones) | #00DDDB | 0.055 |
| Achromatopsia (no color) | #C4C4C4 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63D3EC
#63D3EC
oklch(81.1% 0.107 214.6)
- #FEA892
#FEA892
oklch(81.1% 0.107 35)
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 #63D3EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky Blue #87CEEB ΔE 0.032
- Vivid Sky Blue #4CC9F0 ΔE 0.036
- Aqua Blue #02D8E9 ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.041
- Light Sky Blue #87CEFA ΔE 0.042
- Sky #82CAFC ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.052
Use #63D3EC 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.