#4D63CF
Closest named color: Royal Blue (#4169E1). oklch(54.1% 0.168 271.1), rgb(77, 99, 207).
Aa
White text reads best on this color (5.24:1).
About this color
#4D63CF is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.168 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.031 away. White text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #4D63CF |
| RGB | rgb(77, 99, 207) |
| HSL | hsl(230, 58%, 56%) |
| OKLCH | oklch(54.1% 0.168 271.1) |
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 #4D63CF | 5.24:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #4D63CF | 4.00:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #4D63CF text on white | 5.24:1 | AA | Lc 75.7 | Fine for body text |
| #4D63CF text on black | 4.00:1 | AA large text | Lc -26.0 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#859CEC
oklch(70.8% 0.12 270.9)
-
Step 500
500
#6881E6
oklch(63.2% 0.154 271)
-
Step 600
600 (this color)
#4D63CF
oklch(54.1% 0.168 271.1)
-
Step 700
700
#4256B8
oklch(49.2% 0.156 270.9)
-
Step 800
800
#364795
oklch(42.8% 0.129 270.8)
-
Step 900
900
#2F3C76
oklch(37.7% 0.1 271.4)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#4D63CF 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) | #2072D3 | 0.048 |
| Deuteranopia (no green cones) | #0067CD | 0.050 |
| Tritanopia (no blue cones) | #007C8F | 0.142 |
| Achromatopsia (no color) | #6C6C6C | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D63CF
#4D63CF
oklch(54.1% 0.168 271.1)
- #876C00
#876C00
oklch(54.2% 0.111 91.4)
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 #4D63CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.034
- Warm Blue #4B57DB ΔE 0.035
- Iris #6258C4 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.047
- Neon Blue #4361EE ΔE 0.049
- Mid Blue #276AB3 ΔE 0.061
Use #4D63CF 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.