#63C1DB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76.3% 0.096 218.2), rgb(99, 193, 219).
Aa
Black text reads best on this color (10.18:1).
About this color
#63C1DB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.096 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.033 away. Black text reads best on it, at 10.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.18:1 |
| White text | 2.06:1 |
Values
| HEX | #63C1DB |
| RGB | rgb(99, 193, 219) |
| HSL | hsl(193, 62%, 62%) |
| OKLCH | oklch(76.3% 0.096 218.2) |
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 #63C1DB | 2.06:1 | Fails | Lc -44.6 | Non-text elements, placeholder text |
| Black text on #63C1DB | 10.18:1 | AAA | Lc 63.9 | Content text, not long reading |
| #63C1DB text on white | 2.06:1 | Fails | Lc 40.0 | Non-text elements, placeholder text |
| #63C1DB text on black | 10.18:1 | AAA | Lc -62.3 | 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
#ECF8FB
oklch(97.1% 0.013 214.4)
-
Step 100
100
#D6EFF6
oklch(93.6% 0.028 216.4)
-
Step 200
200
#B2E2F1
oklch(88.4% 0.054 218.9)
-
Step 300
300 (this color)
#63C1DB
oklch(76.3% 0.096 218.2)
-
Step 400
400
#00B3D5
oklch(70.8% 0.127 217.9)
-
Step 500
500
#0099B7
oklch(63.1% 0.114 218.3)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#63C1DB 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) | #B0BCDC | 0.083 |
| Deuteranopia (no green cones) | #9EAFDB | 0.074 |
| Tritanopia (no blue cones) | #00CAC9 | 0.058 |
| Achromatopsia (no color) | #B4B4B4 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63C1DB
#63C1DB
oklch(76.3% 0.096 218.2)
- #E89D85
#E89D85
oklch(76.4% 0.097 38.5)
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 #63C1DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.033
- Lightblue #7BC8F6 ΔE 0.048
- Light Cornflower Blue #98C1D9 ΔE 0.053
- Sky Blue #87CEEB ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.056
- Bright Sky Blue #02CCFE ΔE 0.057
- Medium Turquoise #48D1CC ΔE 0.058
- Light Grey Blue #9DBCD4 ΔE 0.058
Use #63C1DB 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.