#63BCF7
Closest named color: Deep Sky Blue (#00BFFF). oklch(76.4% 0.121 240), rgb(99, 188, 247).
Aa
Black text reads best on this color (10.06:1).
About this color
#63BCF7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.121 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.039 away. Black text reads best on it, at 10.06:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 10.06:1 |
| White text | 2.08:1 |
Values
| HEX | #63BCF7 |
| RGB | rgb(99, 188, 247) |
| HSL | hsl(204, 90%, 68%) |
| OKLCH | oklch(76.4% 0.121 240) |
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 #63BCF7 | 2.08:1 | Fails | Lc -45.1 | Large or bold text, headings |
| Black text on #63BCF7 | 10.06:1 | AAA | Lc 63.4 | Content text, not long reading |
| #63BCF7 text on white | 2.08:1 | Fails | Lc 40.6 | Non-text elements, placeholder text |
| #63BCF7 text on black | 10.06:1 | AAA | Lc -61.7 | Content text, not long reading |
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 300.
-
Step 50
50
#EDF7FF
oklch(97.1% 0.015 241.8)
-
Step 100
100
#D6EEFF
oklch(93.7% 0.034 238.7)
-
Step 200
200
#B4E0FF
oklch(88.6% 0.063 239.1)
-
Step 300
300 (this color)
#63BCF7
oklch(76.4% 0.121 240)
-
Step 400
400
#00ABFA
oklch(70.7% 0.162 240)
-
Step 500
500
#0093D7
oklch(63.2% 0.144 239.7)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557F
oklch(42.8% 0.098 239.8)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#63BCF7 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) | #A1BCFA | 0.065 |
| Deuteranopia (no green cones) | #8DADF6 | 0.054 |
| Tritanopia (no blue cones) | #00CBD0 | 0.090 |
| Achromatopsia (no color) | #B3B3B3 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BCF7
#63BCF7
oklch(76.4% 0.121 240)
- #EA9F5F
#EA9F5F
oklch(76.3% 0.12 60)
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 #63BCF7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.039
- Carolina Blue #8AB8FE ΔE 0.041
- Vivid Sky Blue #4CC9F0 ΔE 0.041
- Lightblue #7BC8F6 ΔE 0.042
- Sky #82CAFC ΔE 0.050
- Bright Sky Blue #02CCFE ΔE 0.051
- Light Sky Blue #87CEFA ΔE 0.063
- Pastel Blue #A2BFFE ΔE 0.068
Use #63BCF7 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.