#63A1DA
Closest named color: Cornflower Blue (#6495ED). oklch(69% 0.106 247.6), rgb(99, 161, 218).
Aa
Black text reads best on this color (7.64:1).
About this color
#63A1DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.106 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.048 away. Black text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.64:1 |
| White text | 2.74:1 |
Values
| HEX | #63A1DA |
| RGB | rgb(99, 161, 218) |
| HSL | hsl(209, 62%, 62%) |
| OKLCH | oklch(69% 0.106 247.6) |
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 #63A1DA | 2.74:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #63A1DA | 7.64:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #63A1DA text on white | 2.74:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #63A1DA text on black | 7.64:1 | AAA | Lc -48.9 | 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
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#9FC5EA
oklch(80.9% 0.066 248)
-
Step 400
400 (this color)
#63A1DA
oklch(69% 0.106 247.6)
-
Step 500
500
#398FD7
oklch(63.2% 0.136 247.4)
-
Step 600
600
#0377C4
oklch(55.5% 0.148 247.8)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#015289
oklch(42.7% 0.113 247.5)
-
Step 900
900
#11446E
oklch(37.7% 0.089 248.1)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#63A1DA 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) | #89A3DD | 0.044 |
| Deuteranopia (no green cones) | #7997D9 | 0.033 |
| Tritanopia (no blue cones) | #0DAEB5 | 0.090 |
| Achromatopsia (no color) | #9C9C9C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A1DA
#63A1DA
oklch(69% 0.106 247.6)
- #C78E4E
#C78E4E
oklch(69% 0.107 67.6)
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 #63A1DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.057
- Greyblue #77A1B5 ΔE 0.058
- Faded Blue #658CBB ΔE 0.065
- Dark Sky Blue #448EE4 ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.070
- Bluey Grey #89A0B0 ΔE 0.072
- Cool Gray #8D99AE ΔE 0.074
Use #63A1DA 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.