#63CBE7
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79.1% 0.104 217.9), rgb(99, 203, 231).
Aa
Black text reads best on this color (11.22:1).
About this color
#63CBE7 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.104 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.021 away. Black text reads best on it, at 11.22:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.22:1 |
| White text | 1.87:1 |
Values
| HEX | #63CBE7 |
| RGB | rgb(99, 203, 231) |
| HSL | hsl(193, 73%, 65%) |
| OKLCH | oklch(79.1% 0.104 217.9) |
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 #63CBE7 | 1.87:1 | Fails | Lc -39.4 | Non-text elements, placeholder text |
| Black text on #63CBE7 | 11.22:1 | AAA | Lc 68.7 | Content text, not long reading |
| #63CBE7 text on white | 1.87:1 | Fails | Lc 35.2 | Non-text elements, placeholder text |
| #63CBE7 text on black | 11.22:1 | AAA | Lc -67.4 | 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
#ECF8FC
oklch(97.1% 0.014 219.6)
-
Step 100
100
#D5EFF7
oklch(93.6% 0.029 218.2)
-
Step 200
200
#AFE3F3
oklch(88.5% 0.058 218.6)
-
Step 300
300 (this color)
#63CBE7
oklch(79.1% 0.104 217.9)
-
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
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#63CBE7 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) | #B9C6E9 | 0.090 |
| Deuteranopia (no green cones) | #A5B7E7 | 0.081 |
| Tritanopia (no blue cones) | #00D5D4 | 0.058 |
| Achromatopsia (no color) | #BDBDBD | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CBE7
#63CBE7
oklch(79.1% 0.104 217.9)
- #F5A38A
#F5A38A
oklch(79% 0.104 37.7)
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 #63CBE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.021
- Lightblue #7BC8F6 ΔE 0.034
- Sky Blue #87CEEB ΔE 0.035
- Sky #82CAFC ΔE 0.044
- Light Sky Blue #87CEFA ΔE 0.045
- Aqua Blue #02D8E9 ΔE 0.045
- Bright Sky Blue #02CCFE ΔE 0.045
- Medium Turquoise #48D1CC ΔE 0.052
Use #63CBE7 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.