#63A5DC
Closest named color: Cornflower Blue (#6495ED). oklch(70% 0.106 245.2), rgb(99, 165, 220).
Aa
Black text reads best on this color (7.94:1).
About this color
#63A5DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.106 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.056 away. Black text reads best on it, at 7.94:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.94:1 |
| White text | 2.64:1 |
Values
| HEX | #63A5DC |
| RGB | rgb(99, 165, 220) |
| HSL | hsl(207, 63%, 63%) |
| OKLCH | oklch(70% 0.106 245.2) |
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 #63A5DC | 2.64:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #63A5DC | 7.94:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #63A5DC text on white | 2.64:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #63A5DC text on black | 7.94:1 | AAA | Lc -50.6 | 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)
#63A5DC
oklch(70% 0.106 245.2)
-
Step 500
500
#3390D5
oklch(63.1% 0.135 245.1)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#0B456D
oklch(37.7% 0.088 245.2)
-
Step 950
950
#0A2940
oklch(27.1% 0.056 244.7)
#63A5DC 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) | #8EA6DF | 0.049 |
| Deuteranopia (no green cones) | #7D9ADB | 0.038 |
| Tritanopia (no blue cones) | #00B2B8 | 0.089 |
| Achromatopsia (no color) | #9F9F9F | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A5DC
#63A5DC
oklch(70% 0.106 245.2)
- #CC9054
#CC9054
oklch(70% 0.106 64.6)
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 #63A5DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.056
- Greyblue #77A1B5 ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.068
- Bluey Grey #89A0B0 ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.072
- Faded Blue #658CBB ΔE 0.075
- Dark Sky Blue #448EE4 ΔE 0.076
Use #63A5DC 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.