#3B64E4
Closest named color: Royal Blue (#4169E1). oklch(55% 0.2 266.3), rgb(59, 100, 228).
Aa
White text reads best on this color (5.08:1).
About this color
#3B64E4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.200 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.015 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #3B64E4 |
| RGB | rgb(59, 100, 228) |
| HSL | hsl(225, 76%, 56%) |
| OKLCH | oklch(55% 0.2 266.3) |
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 #3B64E4 | 5.08:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #3B64E4 | 4.12:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #3B64E4 text on white | 5.08:1 | AA | Lc 74.6 | Content text, not long reading |
| #3B64E4 text on black | 4.12:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#779CFA
oklch(70.7% 0.144 266.5)
-
Step 500
500
#5580F7
oklch(63% 0.184 266.3)
-
Step 600
600 (this color)
#3B64E4
oklch(55% 0.2 266.3)
-
Step 700
700
#2F54C8
oklch(49.1% 0.185 266.1)
-
Step 800
800
#2845A2
oklch(42.7% 0.154 266.6)
-
Step 900
900
#243C80
oklch(37.8% 0.119 266.2)
-
Step 950
950
#15234B
oklch(26.9% 0.076 266.7)
#3B64E4 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) | #0076E8 | 0.046 |
| Deuteranopia (no green cones) | #0067E1 | 0.030 |
| Tritanopia (no blue cones) | #00849A | 0.159 |
| Achromatopsia (no color) | #6E6E6E | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B64E4
#3B64E4
oklch(55% 0.2 266.3)
- #8E6C00
#8E6C00
oklch(55% 0.113 86.7)
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 #3B64E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.015
- Neon Blue #4361EE ΔE 0.018
- Azul #1D5DEC ΔE 0.032
- Warm Blue #4B57DB ΔE 0.034
- Cerulean Blue #056EEE ΔE 0.034
- Bright Blue #0165FC ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.058
- Clear Blue #247AFD ΔE 0.062
Use #3B64E4 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.