#4C63DD
Closest named color: Royal Blue (#4169E1). oklch(55.1% 0.187 270.9), rgb(76, 99, 221).
Aa
White text reads best on this color (5.07:1).
About this color
#4C63DD is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.187 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.017 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #4C63DD |
| RGB | rgb(76, 99, 221) |
| HSL | hsl(230, 68%, 58%) |
| OKLCH | oklch(55.1% 0.187 270.9) |
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 #4C63DD | 5.07:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #4C63DD | 4.13:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #4C63DD text on white | 5.07:1 | AA | Lc 74.6 | Content text, not long reading |
| #4C63DD text on black | 4.13:1 | AA large text | Lc -27.1 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF8
oklch(80.8% 0.085 271.1)
-
Step 400
400
#829BF4
oklch(70.8% 0.133 270.8)
-
Step 500
500
#647FF0
oklch(63.2% 0.171 270.7)
-
Step 600
600 (this color)
#4C63DD
oklch(55.1% 0.187 270.9)
-
Step 700
700
#3F53C1
oklch(49.1% 0.173 270.9)
-
Step 800
800
#34449C
oklch(42.6% 0.144 271.2)
-
Step 900
900
#2C3B7C
oklch(37.7% 0.111 270.5)
-
Step 950
950
#1A2349
oklch(27.1% 0.071 270.9)
#4C63DD 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) | #0075E1 | 0.056 |
| Deuteranopia (no green cones) | #0068DB | 0.047 |
| Tritanopia (no blue cones) | #008096 | 0.155 |
| Achromatopsia (no color) | #6E6E6E | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C63DD
#4C63DD
oklch(55.1% 0.187 270.9)
- #8A6E00
#8A6E00
oklch(55% 0.112 91.1)
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 #4C63DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.017
- Neon Blue #4361EE ΔE 0.028
- Warm Blue #4B57DB ΔE 0.028
- Dark Periwinkle #665FD1 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.049
- Azul #1D5DEC ΔE 0.050
- Iris #6258C4 ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.051
Use #4C63DD 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.