#63A4FA
Closest named color: Cornflower Blue (#6495ED). oklch(71.3% 0.143 256), rgb(99, 164, 250).
Aa
Black text reads best on this color (8.22:1).
About this color
#63A4FA is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.143 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 8.22:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.22:1 |
| White text | 2.55:1 |
Values
| HEX | #63A4FA |
| RGB | rgb(99, 164, 250) |
| HSL | hsl(214, 94%, 68%) |
| OKLCH | oklch(71.3% 0.143 256) |
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 #63A4FA | 2.55:1 | Fails | Lc -54.9 | Large or bold text, headings |
| Black text on #63A4FA | 8.22:1 | AAA | Lc 54.2 | Large or bold text, headings |
| #63A4FA text on white | 2.55:1 | Fails | Lc 49.8 | Large or bold text, headings |
| #63A4FA text on black | 8.22:1 | AAA | Lc -52.1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3FA
oklch(80.8% 0.089 256.5)
-
Step 400
400 (this color)
#63A4FA
oklch(71.3% 0.143 256)
-
Step 500
500
#2F88F5
oklch(63.2% 0.183 255.9)
-
Step 600
600
#006FDF
oklch(55.6% 0.191 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#09407F
oklch(37.7% 0.119 255.9)
-
Step 950
950
#09264A
oklch(27% 0.075 255.8)
#63A4FA 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) | #7FAAFE | 0.036 |
| Deuteranopia (no green cones) | #6B9BF8 | 0.023 |
| Tritanopia (no blue cones) | #00B8C3 | 0.121 |
| Achromatopsia (no color) | #A2A2A2 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4FA
#63A4FA
oklch(71.3% 0.143 256)
- #D5941C
#D5941C
oklch(71.3% 0.143 75.8)
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 #63A4FA, 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 0.051
- Periwinkle Blue #8F99FB ΔE 0.054
- Carolina Blue #8AB8FE ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.073
- Soft Blue #6488EA ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.074
- Deep Sky Blue #00BFFF ΔE 0.076
Use #63A4FA 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.