#63A7FD
Closest named color: Cornflower Blue (#6495ED). oklch(72.1% 0.144 255.1), rgb(99, 167, 253).
Aa
Black text reads best on this color (8.47:1).
About this color
#63A7FD is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.144 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.049 away. Black text reads best on it, at 8.47:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.47:1 |
| White text | 2.47:1 |
Values
| HEX | #63A7FD |
| RGB | rgb(99, 167, 253) |
| HSL | hsl(214, 97%, 69%) |
| OKLCH | oklch(72.1% 0.144 255.1) |
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 #63A7FD | 2.47:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #63A7FD | 8.47:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #63A7FD text on white | 2.47:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #63A7FD text on black | 8.47:1 | AAA | Lc -53.5 | 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
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#99C4FA
oklch(80.9% 0.09 254.4)
-
Step 400
400 (this color)
#63A7FD
oklch(72.1% 0.144 255.1)
-
Step 500
500
#2A88F5
oklch(63% 0.184 255.3)
-
Step 600
600
#0071DB
oklch(55.7% 0.183 255)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#05407F
oklch(37.6% 0.12 255.2)
-
Step 950
950
#07264A
oklch(26.9% 0.076 254.9)
#63A7FD 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) | #82ADFF | 0.038 |
| Deuteranopia (no green cones) | #6E9EFB | 0.024 |
| Tritanopia (no blue cones) | #00BBC6 | 0.120 |
| Achromatopsia (no color) | #A5A5A5 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A7FD
#63A7FD
oklch(72.1% 0.144 255.1)
- #D9961F
#D9961F
oklch(72.2% 0.144 75.1)
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 #63A7FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.049
- Periwinkle Blue #8F99FB ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.058
- Carolina Blue #8AB8FE ΔE 0.065
- Deep Sky Blue #00BFFF ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.080
- Dark Sky Blue #448EE4 ΔE 0.081
- Soft Blue #6488EA ΔE 0.081
Use #63A7FD 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.