#63A6DC
Closest named color: Greyblue (#77A1B5). oklch(70.2% 0.105 244.4), rgb(99, 166, 220).
Aa
Black text reads best on this color (8.01:1).
About this color
#63A6DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.105 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.057 away. Black text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.01:1 |
| White text | 2.61:1 |
Values
| HEX | #63A6DC |
| RGB | rgb(99, 166, 220) |
| HSL | hsl(207, 63%, 63%) |
| OKLCH | oklch(70.2% 0.105 244.4) |
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 #63A6DC | 2.61:1 | Fails | Lc -56.1 | Large or bold text, headings |
| Black text on #63A6DC | 8.01:1 | AAA | Lc 53.1 | Large or bold text, headings |
| #63A6DC text on white | 2.61:1 | Fails | Lc 50.9 | Large or bold text, headings |
| #63A6DC text on black | 8.01:1 | AAA | Lc -51.0 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9DC6E9
oklch(80.9% 0.066 244.5)
-
Step 400
400 (this color)
#63A6DC
oklch(70.2% 0.105 244.4)
-
Step 500
500
#3290D4
oklch(63% 0.134 244.5)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#0A456C
oklch(37.6% 0.087 244.3)
-
Step 950
950
#0A293F
oklch(27.1% 0.054 243.5)
#63A6DC 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) | #8FA7DE | 0.050 |
| Deuteranopia (no green cones) | #7F9ADB | 0.041 |
| Tritanopia (no blue cones) | #00B3B8 | 0.089 |
| Achromatopsia (no color) | #A0A0A0 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A6DC
#63A6DC
oklch(70.2% 0.105 244.4)
- #CD9156
#CD9156
oklch(70.3% 0.105 64.2)
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 #63A6DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.066
- Bluegrey #85A3B2 ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.071
- Bluey Grey #89A0B0 ΔE 0.071
- Cool Gray #8D99AE ΔE 0.077
- Faded Blue #658CBB ΔE 0.077
Use #63A6DC 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.