#63C0CF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.6% 0.091 209.2), rgb(99, 192, 207).
Aa
Black text reads best on this color (9.97:1).
About this color
#63C0CF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.091 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.047 away. Black text reads best on it, at 9.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.97:1 |
| White text | 2.10:1 |
Values
| HEX | #63C0CF |
| RGB | rgb(99, 192, 207) |
| HSL | hsl(188, 53%, 60%) |
| OKLCH | oklch(75.6% 0.091 209.2) |
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 #63C0CF | 2.10:1 | Fails | Lc -45.7 | Large or bold text, headings |
| Black text on #63C0CF | 9.97:1 | AAA | Lc 62.9 | Content text, not long reading |
| #63C0CF text on white | 2.10:1 | Fails | Lc 41.1 | Non-text elements, placeholder text |
| #63C0CF text on black | 9.97:1 | AAA | Lc -61.2 | 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 400.
-
Step 50
50
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C2DFE4
oklch(88.4% 0.031 209.2)
-
Step 300
300
#96CBD4
oklch(80.8% 0.056 209.1)
-
Step 400
400 (this color)
#63C0CF
oklch(75.6% 0.091 209.2)
-
Step 500
500
#009BAD
oklch(63.1% 0.109 209.2)
-
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
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#63C0CF 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) | #B2BAD0 | 0.087 |
| Deuteranopia (no green cones) | #A1ADCF | 0.080 |
| Tritanopia (no blue cones) | #0FC7C4 | 0.048 |
| Achromatopsia (no color) | #B3B3B3 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63C0CF
#63C0CF
oklch(75.6% 0.091 209.2)
- #E49A8F
#E49A8F
oklch(75.6% 0.091 28.7)
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 #63C0CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.047
- Dark Turquoise #00CED1 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.051
- Light Cornflower Blue #98C1D9 ΔE 0.057
- Light Grey Blue #9DBCD4 ΔE 0.061
- Lightblue #7BC8F6 ΔE 0.063
- Sky Blue #87CEEB ΔE 0.064
- Pale Teal #82CBB2 ΔE 0.065
Use #63C0CF 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.