#63A3DC
Closest named color: Cornflower Blue (#6495ED). oklch(69.6% 0.107 246.9), rgb(99, 163, 220).
Aa
Black text reads best on this color (7.80:1).
About this color
#63A3DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.107 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.051 away. Black text reads best on it, at 7.80:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.80:1 |
| White text | 2.69:1 |
Values
| HEX | #63A3DC |
| RGB | rgb(99, 163, 220) |
| HSL | hsl(208, 63%, 63%) |
| OKLCH | oklch(69.6% 0.107 246.9) |
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 #63A3DC | 2.69:1 | Fails | Lc -57.3 | Large or bold text, headings |
| Black text on #63A3DC | 7.80:1 | AAA | Lc 51.9 | Large or bold text, headings |
| #63A3DC text on white | 2.69:1 | Fails | Lc 52.1 | Large or bold text, headings |
| #63A3DC text on black | 7.80:1 | AAA | Lc -49.8 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC5EA
oklch(80.8% 0.067 247.3)
-
Step 400
400 (this color)
#63A3DC
oklch(69.6% 0.107 246.9)
-
Step 500
500
#368FD7
oklch(63.1% 0.137 246.9)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#0E446E
oklch(37.6% 0.09 247.4)
-
Step 950
950
#0B2840
oklch(26.9% 0.056 247)
#63A3DC 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) | #8BA4DF | 0.046 |
| Deuteranopia (no green cones) | #7B98DB | 0.037 |
| Tritanopia (no blue cones) | #02B0B7 | 0.090 |
| Achromatopsia (no color) | #9E9E9E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A3DC
#63A3DC
oklch(69.6% 0.107 246.9)
- #CA8F50
#CA8F50
oklch(69.5% 0.107 66.2)
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 #63A3DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.051
- Greyblue #77A1B5 ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.059
- Bluegrey #85A3B2 ΔE 0.070
- Faded Blue #658CBB ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.071
- Bluey Grey #89A0B0 ΔE 0.073
- Turquoise Blue #06B1C4 ΔE 0.075
Use #63A3DC 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.