#63C8D9
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.9% 0.097 209.9), rgb(99, 200, 217).
Aa
Black text reads best on this color (10.79:1).
About this color
#63C8D9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.097 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.034 away. Black text reads best on it, at 10.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.79:1 |
| White text | 1.94:1 |
Values
| HEX | #63C8D9 |
| RGB | rgb(99, 200, 217) |
| HSL | hsl(189, 61%, 62%) |
| OKLCH | oklch(77.9% 0.097 209.9) |
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 #63C8D9 | 1.94:1 | Fails | Lc -41.5 | Non-text elements, placeholder text |
| Black text on #63C8D9 | 10.79:1 | AAA | Lc 66.7 | Content text, not long reading |
| #63C8D9 text on white | 1.94:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #63C8D9 text on black | 10.79:1 | AAA | Lc -65.3 | 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
#ECF8FA
oklch(97.1% 0.013 208.8)
-
Step 100
100
#D5EFF4
oklch(93.5% 0.028 210.5)
-
Step 200
200
#B0E4ED
oklch(88.6% 0.055 209.3)
-
Step 300
300 (this color)
#63C8D9
oklch(77.9% 0.097 209.9)
-
Step 400
400
#00B5CA
oklch(70.8% 0.122 209.4)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#63C8D9 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) | #B9C2DA | 0.092 |
| Deuteranopia (no green cones) | #A7B4D9 | 0.084 |
| Tritanopia (no blue cones) | #00D0CD | 0.049 |
| Achromatopsia (no color) | #BABABA | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63C8D9
#63C8D9
oklch(77.9% 0.097 209.9)
- #EEA092
#EEA092
oklch(77.9% 0.096 30.6)
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 #63C8D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Medium Turquoise #48D1CC ΔE 0.040
- Dark Turquoise #00CED1 ΔE 0.044
- Sky Blue #87CEEB ΔE 0.046
- Aqua Blue #02D8E9 ΔE 0.049
- Lightblue #7BC8F6 ΔE 0.050
- Light Cornflower Blue #98C1D9 ΔE 0.053
- Bright Sky Blue #02CCFE ΔE 0.058
Use #63C8D9 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.