#63C1DF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76.5% 0.099 221.3), rgb(99, 193, 223).
Aa
Black text reads best on this color (10.22:1).
About this color
#63C1DF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.099 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.029 away. Black text reads best on it, at 10.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.22:1 |
| White text | 2.05:1 |
Values
| HEX | #63C1DF |
| RGB | rgb(99, 193, 223) |
| HSL | hsl(195, 66%, 63%) |
| OKLCH | oklch(76.5% 0.099 221.3) |
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 #63C1DF | 2.05:1 | Fails | Lc -44.4 | Non-text elements, placeholder text |
| Black text on #63C1DF | 10.22:1 | AAA | Lc 64.1 | Content text, not long reading |
| #63C1DF text on white | 2.05:1 | Fails | Lc 39.8 | Non-text elements, placeholder text |
| #63C1DF text on black | 10.22:1 | AAA | Lc -62.5 | 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
#D6EFF8
oklch(93.7% 0.029 221.4)
-
Step 200
200
#B2E2F3
oklch(88.5% 0.055 221.5)
-
Step 300
300 (this color)
#63C1DF
oklch(76.5% 0.099 221.3)
-
Step 400
400
#00B2D9
oklch(70.7% 0.13 221)
-
Step 500
500
#0098BB
oklch(63% 0.116 221.8)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#63C1DF 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) | #AFBDE1 | 0.081 |
| Deuteranopia (no green cones) | #9DAFDF | 0.073 |
| Tritanopia (no blue cones) | #00CBCA | 0.062 |
| Achromatopsia (no color) | #B5B5B5 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63C1DF
#63C1DF
oklch(76.5% 0.099 221.3)
- #E99D81
#E99D81
oklch(76.4% 0.1 41)
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 #63C1DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Lightblue #7BC8F6 ΔE 0.044
- Light Cornflower Blue #98C1D9 ΔE 0.052
- Bright Sky Blue #02CCFE ΔE 0.053
- Sky Blue #87CEEB ΔE 0.053
- Sky #82CAFC ΔE 0.056
- Light Grey Blue #9DBCD4 ΔE 0.058
- Dark Turquoise #00CED1 ΔE 0.059
Use #63C1DF 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.