#3564BD
Closest named color: Mid Blue (#276AB3). oklch(51.8% 0.149 261.7), rgb(53, 100, 189).
Aa
White text reads best on this color (5.66:1).
About this color
#3564BD is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.149 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #3564BD |
| RGB | rgb(53, 100, 189) |
| HSL | hsl(219, 56%, 47%) |
| OKLCH | oklch(51.8% 0.149 261.7) |
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 #3564BD | 5.66:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #3564BD | 3.70:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #3564BD text on white | 5.66:1 | AA | Lc 78.0 | Fine for body text |
| #3564BD text on black | 3.70:1 | AA large text | Lc -23.8 | 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 700.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A7C1F0
oklch(80.8% 0.073 262.2)
-
Step 400
400
#78A0E9
oklch(70.7% 0.116 261.9)
-
Step 500
500
#5687E2
oklch(63.2% 0.147 261.7)
-
Step 600
600
#3B6ED0
oklch(55.5% 0.161 261.9)
-
Step 700
700 (this color)
#3564BD
oklch(51.8% 0.149 261.7)
-
Step 800
800
#264B92
oklch(42.6% 0.125 261.9)
-
Step 900
900
#234074
oklch(37.8% 0.096 261.1)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#3564BD 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) | #356EC0 | 0.027 |
| Deuteranopia (no green cones) | #1361BB | 0.025 |
| Tritanopia (no blue cones) | #007987 | 0.119 |
| Achromatopsia (no color) | #676767 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3564BD
#3564BD
oklch(51.8% 0.149 261.7)
- #876100
#876100
oklch(51.8% 0.107 81.8)
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 #3564BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.038
- Windows Blue #3778BF ΔE 0.055
- Royal Blue #4169E1 ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.059
- Iris #6258C4 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.062
- Dusky Blue #475F94 ΔE 0.065
Use #3564BD 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.