#3E64C7
Closest named color: Royal Blue (#4169E1). oklch(52.9% 0.16 265.5), rgb(62, 100, 199).
Aa
White text reads best on this color (5.45:1).
About this color
#3E64C7 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.160 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 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.85:1 |
| White text | 5.45:1 |
Values
| HEX | #3E64C7 |
| RGB | rgb(62, 100, 199) |
| HSL | hsl(223, 55%, 51%) |
| OKLCH | oklch(52.9% 0.16 265.5) |
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 #3E64C7 | 5.45:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #3E64C7 | 3.85:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #3E64C7 text on white | 5.45:1 | AA | Lc 76.8 | Fine for body text |
| #3E64C7 text on black | 3.85:1 | 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#AAC0F0
oklch(80.8% 0.072 265.6)
-
Step 400
400
#7E9FE9
oklch(70.8% 0.115 265.3)
-
Step 500
500
#5E85E2
oklch(63.2% 0.147 265.3)
-
Step 600
600 (this color)
#3E64C7
oklch(52.9% 0.16 265.5)
-
Step 700
700
#375AB4
oklch(49.2% 0.149 265.3)
-
Step 800
800
#2E4A92
oklch(42.8% 0.123 265.5)
-
Step 900
900
#293E74
oklch(37.6% 0.096 266)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#3E64C7 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) | #2B70CB | 0.032 |
| Deuteranopia (no green cones) | #0064C5 | 0.035 |
| Tritanopia (no blue cones) | #007B8C | 0.130 |
| Achromatopsia (no color) | #696969 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E64C7
#3E64C7
oklch(52.9% 0.16 265.5)
- #886600
#886600
oklch(53% 0.109 85.6)
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 #3E64C7, 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 0.048
- Iris #6258C4 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.054
- Windows Blue #3778BF ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.060
Use #3E64C7 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.