#63A5EE
Closest named color: Cornflower Blue (#6495ED). oklch(70.9% 0.127 252.2), rgb(99, 165, 238).
Aa
Black text reads best on this color (8.14:1).
About this color
#63A5EE is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.127 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.043 away. Black text reads best on it, at 8.14:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.14:1 |
| White text | 2.57:1 |
Values
| HEX | #63A5EE |
| RGB | rgb(99, 165, 238) |
| HSL | hsl(212, 80%, 66%) |
| OKLCH | oklch(70.9% 0.127 252.2) |
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 #63A5EE | 2.57:1 | Fails | Lc -55.3 | Large or bold text, headings |
| Black text on #63A5EE | 8.14:1 | AAA | Lc 53.8 | Large or bold text, headings |
| #63A5EE text on white | 2.57:1 | Fails | Lc 50.2 | Large or bold text, headings |
| #63A5EE text on black | 8.14:1 | AAA | Lc -51.7 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9CC4F3
oklch(80.8% 0.079 252.8)
-
Step 400
400 (this color)
#63A5EE
oklch(70.9% 0.127 252.2)
-
Step 500
500
#308CE8
oklch(63.2% 0.162 252.1)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#094277
oklch(37.6% 0.106 252.2)
-
Step 950
950
#092746
oklch(26.9% 0.068 252.4)
#63A5EE 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) | #86A9F1 | 0.041 |
| Deuteranopia (no green cones) | #749BED | 0.029 |
| Tritanopia (no blue cones) | #00B6BF | 0.107 |
| Achromatopsia (no color) | #A1A1A1 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A5EE
#63A5EE
oklch(70.9% 0.127 252.2)
- #D1933A
#D1933A
oklch(70.9% 0.127 72.5)
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 #63A5EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.053
- Periwinkle Blue #8F99FB ΔE 0.062
- Carolina Blue #8AB8FE ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.072
- Deep Sky Blue #00BFFF ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.076
- Soft Blue #6488EA ΔE 0.077
Use #63A5EE 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.