#3B64C8
Closest named color: Royal Blue (#4169E1). oklch(52.9% 0.162 264.7), rgb(59, 100, 200).
Aa
White text reads best on this color (5.46:1).
About this color
#3B64C8 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.162 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.041 away. White text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Values
| HEX | #3B64C8 |
| RGB | rgb(59, 100, 200) |
| HSL | hsl(223, 56%, 51%) |
| OKLCH | oklch(52.9% 0.162 264.7) |
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 #3B64C8 | 5.46:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #3B64C8 | 3.84:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #3B64C8 text on white | 5.46:1 | AA | Lc 76.9 | Fine for body text |
| #3B64C8 text on black | 3.84:1 | AA large text | Lc -24.9 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C1F1
oklch(81% 0.073 264)
-
Step 400
400
#7C9FEA
oklch(70.7% 0.117 264.5)
-
Step 500
500
#5C85E3
oklch(63.1% 0.149 264.7)
-
Step 600
600 (this color)
#3B64C8
oklch(52.9% 0.162 264.7)
-
Step 700
700
#345AB5
oklch(49.1% 0.151 264.5)
-
Step 800
800
#2C4A93
oklch(42.8% 0.125 264.8)
-
Step 900
900
#273E75
oklch(37.6% 0.098 265)
-
Step 950
950
#172544
oklch(27% 0.061 264.4)
#3B64C8 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) | #2970CC | 0.032 |
| Deuteranopia (no green cones) | #0063C6 | 0.033 |
| Tritanopia (no blue cones) | #007C8C | 0.132 |
| Achromatopsia (no color) | #696969 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B64C8
#3B64C8
oklch(52.9% 0.162 264.7)
- #886500
#886500
oklch(52.8% 0.108 84.7)
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 #3B64C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.042
- Warm Blue #4B57DB ΔE 0.046
- French Blue #436BAD ΔE 0.050
- Iris #6258C4 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Neon Blue #4361EE ΔE 0.060
Use #3B64C8 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.