#63B3CB
Closest named color: Turquoise Blue (#06B1C4). oklch(72.5% 0.086 219.5), rgb(99, 179, 203).
Aa
Black text reads best on this color (8.84:1).
About this color
#63B3CB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.086 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.048 away. Black text reads best on it, at 8.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.84:1 |
| White text | 2.37:1 |
Values
| HEX | #63B3CB |
| RGB | rgb(99, 179, 203) |
| HSL | hsl(194, 50%, 59%) |
| OKLCH | oklch(72.5% 0.086 219.5) |
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 #63B3CB | 2.37:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #63B3CB | 8.84:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #63B3CB text on white | 2.37:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #63B3CB text on black | 8.84:1 | AAA | Lc -55.4 | Large or bold text, headings |
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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C5DEE7
oklch(88.5% 0.029 221.4)
-
Step 300
300
#9AC9D9
oklch(80.8% 0.054 220.8)
-
Step 400
400 (this color)
#63B3CB
oklch(72.5% 0.086 219.5)
-
Step 500
500
#1998B7
oklch(63% 0.11 220.1)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#052B36
oklch(26.9% 0.045 221.8)
#63B3CB 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) | #A4AFCC | 0.073 |
| Deuteranopia (no green cones) | #94A3CB | 0.065 |
| Tritanopia (no blue cones) | #21BBBA | 0.055 |
| Achromatopsia (no color) | #A8A8A8 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B3CB
#63B3CB
oklch(72.5% 0.086 219.5)
- #D5947E
#D5947E
oklch(72.5% 0.085 39.5)
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 #63B3CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.048
- Greyblue #77A1B5 ΔE 0.051
- Bluegrey #85A3B2 ΔE 0.054
- Bluey Grey #89A0B0 ΔE 0.062
- Cool Steel #97A7B3 ΔE 0.063
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Light Sea Green #20B2AA ΔE 0.068
- Topaz #13BBAF ΔE 0.070
Use #63B3CB 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.