#4C63CC
Closest named color: Royal Blue (#4169E1). oklch(53.8% 0.164 270.7), rgb(76, 99, 204).
Aa
White text reads best on this color (5.29:1).
About this color
#4C63CC is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.164 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. White text reads best on it, at 5.29:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #4C63CC |
| RGB | rgb(76, 99, 204) |
| HSL | hsl(229, 56%, 55%) |
| OKLCH | oklch(53.8% 0.164 270.7) |
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 #4C63CC | 5.29:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #4C63CC | 3.96:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #4C63CC text on white | 5.29:1 | AA | Lc 76.0 | Fine for body text |
| #4C63CC text on black | 3.96:1 | AA large text | Lc -25.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#859CEA
oklch(70.7% 0.117 270.7)
-
Step 500
500
#6881E4
oklch(63.1% 0.151 270.9)
-
Step 600
600 (this color)
#4C63CC
oklch(53.8% 0.164 270.7)
-
Step 700
700
#4256B6
oklch(49.1% 0.153 270.9)
-
Step 800
800
#364793
oklch(42.7% 0.126 270.7)
-
Step 900
900
#2E3C75
oklch(37.6% 0.099 270.6)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#4C63CC 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) | #2571D0 | 0.044 |
| Deuteranopia (no green cones) | #0066CA | 0.049 |
| Tritanopia (no blue cones) | #007B8E | 0.138 |
| Achromatopsia (no color) | #6B6B6B | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C63CC
#4C63CC
oklch(53.8% 0.164 270.7)
- #866B00
#866B00
oklch(53.9% 0.11 91.3)
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 #4C63CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Dark Periwinkle #665FD1 ΔE 0.036
- Warm Blue #4B57DB ΔE 0.038
- Iris #6258C4 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.049
- Neon Blue #4361EE ΔE 0.053
- Mid Blue #276AB3 ΔE 0.057
Use #4C63CC 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.