#5B63E5
Closest named color: Royal Blue (#4169E1). oklch(56.6% 0.194 275.6), rgb(91, 99, 229).
Aa
White text reads best on this color (4.81:1).
About this color
#5B63E5 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.194 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.032 away. White text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.36:1 |
| White text | 4.81:1 |
Values
| HEX | #5B63E5 |
| RGB | rgb(91, 99, 229) |
| HSL | hsl(237, 73%, 63%) |
| OKLCH | oklch(56.6% 0.194 275.6) |
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 #5B63E5 | 4.81:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #5B63E5 | 4.36:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #5B63E5 text on white | 4.81:1 | AA | Lc 73.0 | Content text, not long reading |
| #5B63E5 text on black | 4.36:1 | AA large text | Lc -28.7 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B0BCF9
oklch(80.8% 0.087 275.7)
-
Step 400
400
#8997F7
oklch(70.6% 0.141 275.9)
-
Step 500
500
#6E7AF3
oklch(63% 0.179 275.7)
-
Step 600
600 (this color)
#5B63E5
oklch(56.6% 0.194 275.6)
-
Step 700
700
#494EC4
oklch(49.1% 0.181 275.7)
-
Step 800
800
#3C419E
oklch(42.7% 0.148 275.8)
-
Step 900
900
#32387E
oklch(37.7% 0.117 275.6)
-
Step 950
950
#1D224A
oklch(27.1% 0.074 275)
#5B63E5 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) | #0078E9 | 0.071 |
| Deuteranopia (no green cones) | #006CE2 | 0.064 |
| Tritanopia (no blue cones) | #00829A | 0.166 |
| Achromatopsia (no color) | #727272 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B63E5
#5B63E5
oklch(56.6% 0.194 275.6)
- #8B7500
#8B7500
oklch(56.6% 0.116 95.9)
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 #5B63E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.032
- Neon Blue #4361EE ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.034
- Warm Blue #4B57DB ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.045
- Slate Blue #6A5ACD ΔE 0.045
- Medium Slate Blue #7B68EE ΔE 0.051
- Iris #6258C4 ΔE 0.055
Use #5B63E5 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.