#63A4FC
Closest named color: Cornflower Blue (#6495ED). oklch(71.4% 0.146 256.4), rgb(99, 164, 252).
Aa
Black text reads best on this color (8.24:1).
About this color
#63A4FC is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.146 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.24:1 |
| White text | 2.54:1 |
Values
| HEX | #63A4FC |
| RGB | rgb(99, 164, 252) |
| HSL | hsl(215, 96%, 69%) |
| OKLCH | oklch(71.4% 0.146 256.4) |
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 #63A4FC | 2.54:1 | Fails | Lc -54.8 | Large or bold text, headings |
| Black text on #63A4FC | 8.24:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #63A4FC text on white | 2.54:1 | Fails | Lc 49.7 | Large or bold text, headings |
| #63A4FC text on black | 8.24:1 | AAA | Lc -52.3 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFB
oklch(88.5% 0.051 256.7)
-
Step 300
300
#9AC3FB
oklch(80.8% 0.091 256.3)
-
Step 400
400 (this color)
#63A4FC
oklch(71.4% 0.146 256.4)
-
Step 500
500
#2F87F7
oklch(63.1% 0.187 256.5)
-
Step 600
600
#006FE1
oklch(55.7% 0.193 256.4)
-
Step 700
700
#005DBE
oklch(49.2% 0.17 256.3)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900
#094080
oklch(37.8% 0.121 256.1)
-
Step 950
950
#09264B
oklch(27.1% 0.077 256.3)
#63A4FC 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) | #7EAAFF | 0.034 |
| Deuteranopia (no green cones) | #6A9CFA | 0.021 |
| Tritanopia (no blue cones) | #00B8C4 | 0.122 |
| Achromatopsia (no color) | #A2A2A2 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4FC
#63A4FC
oklch(71.4% 0.146 256.4)
- #D69414
#D69414
oklch(71.4% 0.146 76)
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 #63A4FC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.052
- Periwinkle Blue #8F99FB ΔE 0.053
- Carolina Blue #8AB8FE ΔE 0.072
- Soft Blue #6488EA ΔE 0.074
- Dark Sky Blue #448EE4 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.075
- Deep Sky Blue #00BFFF ΔE 0.077
Use #63A4FC 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.