#63A4DB
Closest named color: Cornflower Blue (#6495ED). oklch(69.8% 0.105 245.6), rgb(99, 164, 219).
Aa
Black text reads best on this color (7.86:1).
About this color
#63A4DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.105 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.054 away. Black text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.86:1 |
| White text | 2.67:1 |
Values
| HEX | #63A4DB |
| RGB | rgb(99, 164, 219) |
| HSL | hsl(207, 62%, 62%) |
| OKLCH | oklch(69.8% 0.105 245.6) |
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 #63A4DB | 2.67:1 | Fails | Lc -56.9 | Large or bold text, headings |
| Black text on #63A4DB | 7.86:1 | AAA | Lc 52.3 | Large or bold text, headings |
| #63A4DB text on white | 2.67:1 | Fails | Lc 51.8 | Large or bold text, headings |
| #63A4DB text on black | 7.86:1 | AAA | Lc -50.1 | 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
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9EC6E9
oklch(81% 0.065 245.1)
-
Step 400
400 (this color)
#63A4DB
oklch(69.8% 0.105 245.6)
-
Step 500
500
#3590D5
oklch(63.2% 0.134 245.4)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#0D456D
oklch(37.8% 0.088 245.6)
-
Step 950
950
#0B2940
oklch(27.2% 0.055 245.2)
#63A4DB 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) | #8DA5DE | 0.048 |
| Deuteranopia (no green cones) | #7D99DA | 0.038 |
| Tritanopia (no blue cones) | #05B1B7 | 0.089 |
| Achromatopsia (no color) | #9E9E9E | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4DB
#63A4DB
oklch(69.8% 0.105 245.6)
- #CA9053
#CA9053
oklch(69.8% 0.105 66)
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 #63A4DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.054
- Greyblue #77A1B5 ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.063
- Bluegrey #85A3B2 ΔE 0.068
- Bluey Grey #89A0B0 ΔE 0.071
- Faded Blue #658CBB ΔE 0.072
- Turquoise Blue #06B1C4 ΔE 0.073
- Dark Sky Blue #448EE4 ΔE 0.074
Use #63A4DB 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.