#5B63E9
Closest named color: Neon Blue (#4361EE). oklch(56.9% 0.199 275.5), rgb(91, 99, 233).
Aa
White text reads best on this color (4.76:1).
About this color
#5B63E9 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.199 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.031 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #5B63E9 |
| RGB | rgb(91, 99, 233) |
| HSL | hsl(237, 76%, 64%) |
| OKLCH | oklch(56.9% 0.199 275.5) |
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 #5B63E9 | 4.76:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #5B63E9 | 4.40:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #5B63E9 text on white | 4.76:1 | AA | Lc 72.7 | Content text, not long reading |
| #5B63E9 text on black | 4.40:1 | AA large text | Lc -29.0 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#B0BCFB
oklch(80.9% 0.09 275.9)
-
Step 400
400
#8897F9
oklch(70.7% 0.144 275.5)
-
Step 500
500
#6D7AF6
oklch(63.2% 0.183 275.3)
-
Step 600
600 (this color)
#5B63E9
oklch(56.9% 0.199 275.5)
-
Step 700
700
#484DC7
oklch(49.1% 0.186 275.4)
-
Step 800
800
#3B40A1
oklch(42.7% 0.154 275.5)
-
Step 900
900
#32387F
oklch(37.7% 0.118 275.5)
-
Step 950
950
#1D214B
oklch(27% 0.077 275.9)
#5B63E9 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) | #0079ED | 0.071 |
| Deuteranopia (no green cones) | #006DE6 | 0.064 |
| Tritanopia (no blue cones) | #00839C | 0.169 |
| Achromatopsia (no color) | #737373 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B63E9
#5B63E9
oklch(56.9% 0.199 275.5)
- #8C7600
#8C7600
oklch(57% 0.117 96)
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 #5B63E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.031
- Royal Blue #4169E1 ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.040
- Warm Blue #4B57DB ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.050
- Iris #6258C4 ΔE 0.061
Use #5B63E9 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.