#63BFCD
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.3% 0.09 208.4), rgb(99, 191, 205).
Aa
Black text reads best on this color (9.86:1).
About this color
#63BFCD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.090 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.050 away. Black text reads best on it, at 9.86:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.86:1 |
| White text | 2.12:1 |
Values
| HEX | #63BFCD |
| RGB | rgb(99, 191, 205) |
| HSL | hsl(188, 51%, 60%) |
| OKLCH | oklch(75.3% 0.09 208.4) |
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 #63BFCD | 2.12:1 | Fails | Lc -46.2 | Large or bold text, headings |
| Black text on #63BFCD | 9.86:1 | AAA | Lc 62.4 | Content text, not long reading |
| #63BFCD text on white | 2.12:1 | Fails | Lc 41.6 | Non-text elements, placeholder text |
| #63BFCD text on black | 9.86:1 | AAA | Lc -60.7 | 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
#C3DFE4
oklch(88.5% 0.03 209.6)
-
Step 300
300
#96CBD4
oklch(80.8% 0.056 209.1)
-
Step 400
400 (this color)
#63BFCD
oklch(75.3% 0.09 208.4)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C32
oklch(26.8% 0.046 208.8)
#63BFCD 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) | #B1B9CE | 0.086 |
| Deuteranopia (no green cones) | #A1ACCD | 0.080 |
| Tritanopia (no blue cones) | #15C6C3 | 0.046 |
| Achromatopsia (no color) | #B2B2B2 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BFCD
#63BFCD
oklch(75.3% 0.09 208.4)
- #E2998F
#E2998F
oklch(75.2% 0.09 28)
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 #63BFCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.050
- Dark Turquoise #00CED1 ΔE 0.051
- Medium Turquoise #48D1CC ΔE 0.052
- Light Cornflower Blue #98C1D9 ΔE 0.059
- Light Grey Blue #9DBCD4 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.064
- Topaz #13BBAF ΔE 0.065
- Pale Teal #82CBB2 ΔE 0.066
Use #63BFCD 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.