#63B9CC
Closest named color: Turquoise Blue (#06B1C4). oklch(73.9% 0.087 213.8), rgb(99, 185, 204).
Aa
Black text reads best on this color (9.34:1).
About this color
#63B9CC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.087 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.054 away. Black text reads best on it, at 9.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.34:1 |
| White text | 2.24:1 |
Values
| HEX | #63B9CC |
| RGB | rgb(99, 185, 204) |
| HSL | hsl(191, 51%, 59%) |
| OKLCH | oklch(73.9% 0.087 213.8) |
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 #63B9CC | 2.24:1 | Fails | Lc -48.9 | Large or bold text, headings |
| Black text on #63B9CC | 9.34:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #63B9CC text on white | 2.24:1 | Fails | Lc 44.1 | Non-text elements, placeholder text |
| #63B9CC text on black | 9.34:1 | AAA | Lc -58.0 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C4DFE5
oklch(88.6% 0.03 212.6)
-
Step 300
300
#98CAD6
oklch(80.8% 0.055 214.1)
-
Step 400
400 (this color)
#63B9CC
oklch(73.9% 0.087 213.8)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008196
oklch(55.5% 0.098 214.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#022C34
oklch(27% 0.046 213.8)
#63B9CC 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) | #ABB4CD | 0.080 |
| Deuteranopia (no green cones) | #9BA8CC | 0.072 |
| Tritanopia (no blue cones) | #1CC1BF | 0.050 |
| Achromatopsia (no color) | #ADADAD | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B9CC
#63B9CC
oklch(73.9% 0.087 213.8)
- #DC9786
#DC9786
oklch(74% 0.087 34.4)
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 #63B9CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.054
- Vivid Sky Blue #4CC9F0 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.064
- Light Cornflower Blue #98C1D9 ΔE 0.065
- Light Grey Blue #9DBCD4 ΔE 0.065
- Bluegrey #85A3B2 ΔE 0.065
- Topaz #13BBAF ΔE 0.065
- Greyblue #77A1B5 ΔE 0.065
Use #63B9CC 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.