#63ACEC
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.3% 0.119 246.8), rgb(99, 172, 236).
Aa
Black text reads best on this color (8.64:1).
About this color
#63ACEC is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.119 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.059 away. Black text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.64:1 |
| White text | 2.42:1 |
Values
| HEX | #63ACEC |
| RGB | rgb(99, 172, 236) |
| HSL | hsl(208, 78%, 66%) |
| OKLCH | oklch(72.3% 0.119 246.8) |
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 #63ACEC | 2.42:1 | Fails | Lc -52.6 | Large or bold text, headings |
| Black text on #63ACEC | 8.64:1 | AAA | Lc 56.4 | Large or bold text, headings |
| #63ACEC text on white | 2.42:1 | Fails | Lc 47.6 | Large or bold text, headings |
| #63ACEC text on black | 8.64:1 | AAA | Lc -54.4 | 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
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF4
oklch(88.4% 0.042 248.3)
-
Step 300
300
#9AC6EF
oklch(81% 0.075 247)
-
Step 400
400 (this color)
#63ACEC
oklch(72.3% 0.119 246.8)
-
Step 500
500
#238FDF
oklch(63.1% 0.152 246.7)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0065A5
oklch(49.2% 0.128 246.7)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#062843
oklch(26.9% 0.063 247.1)
#63ACEC 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) | #91AEEF | 0.051 |
| Deuteranopia (no green cones) | #7EA0EB | 0.039 |
| Tritanopia (no blue cones) | #00BBC2 | 0.097 |
| Achromatopsia (no color) | #A6A6A6 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63ACEC
#63ACEC
oklch(72.3% 0.119 246.8)
- #D7964D
#D7964D
oklch(72.3% 0.119 67.1)
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 #63ACEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.059
- Carolina Blue #8AB8FE ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.063
- Chefchaouen Blue #4895EF ΔE 0.071
- Periwinkle Blue #8F99FB ΔE 0.074
- Vivid Sky Blue #4CC9F0 ΔE 0.078
- Greyblue #77A1B5 ΔE 0.079
- Lightblue #7BC8F6 ΔE 0.082
Use #63ACEC 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.