#63AAE7
Closest named color: Cornflower Blue (#6495ED). oklch(71.6% 0.115 246.2), rgb(99, 170, 231).
Aa
Black text reads best on this color (8.43:1).
About this color
#63AAE7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.115 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.060 away. Black text reads best on it, at 8.43:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.43:1 |
| White text | 2.48:1 |
Values
| HEX | #63AAE7 |
| RGB | rgb(99, 170, 231) |
| HSL | hsl(208, 73%, 65%) |
| OKLCH | oklch(71.6% 0.115 246.2) |
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 #63AAE7 | 2.48:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #63AAE7 | 8.43:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #63AAE7 text on white | 2.48:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #63AAE7 text on black | 8.43:1 | AAA | Lc -53.3 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9BC6ED
oklch(80.9% 0.072 246.2)
-
Step 400
400 (this color)
#63AAE7
oklch(71.6% 0.115 246.2)
-
Step 500
500
#288FDC
oklch(63% 0.147 246.4)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#034571
oklch(37.8% 0.095 246)
-
Step 950
950
#072842
oklch(26.9% 0.061 246.8)
#63AAE7 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) | #90ABEA | 0.050 |
| Deuteranopia (no green cones) | #7E9EE6 | 0.040 |
| Tritanopia (no blue cones) | #00B9BF | 0.095 |
| Achromatopsia (no color) | #A4A4A4 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AAE7
#63AAE7
oklch(71.6% 0.115 246.2)
- #D49450
#D49450
oklch(71.6% 0.115 65.8)
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 #63AAE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.060
- Deep Sky Blue #00BFFF ΔE 0.064
- Carolina Blue #8AB8FE ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.069
- Greyblue #77A1B5 ΔE 0.072
- Periwinkle Blue #8F99FB ΔE 0.075
- Turquoise Blue #06B1C4 ΔE 0.079
- Bluegrey #85A3B2 ΔE 0.080
Use #63AAE7 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.