#3564B8
Closest named color: Mid Blue (#276AB3). oklch(51.5% 0.142 261), rgb(53, 100, 184).
Aa
White text reads best on this color (5.72:1).
About this color
#3564B8 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.142 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #3564B8 |
| RGB | rgb(53, 100, 184) |
| HSL | hsl(218, 55%, 46%) |
| OKLCH | oklch(51.5% 0.142 261) |
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 #3564B8 | 5.72:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #3564B8 | 3.66:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #3564B8 text on white | 5.72:1 | AA | Lc 78.3 | Fine for body text |
| #3564B8 text on black | 3.66:1 | AA large text | Lc -23.5 | 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
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2EE
oklch(81% 0.069 260.9)
-
Step 400
400
#79A1E5
oklch(70.7% 0.11 260.7)
-
Step 500
500
#5788DE
oklch(63.2% 0.141 260.9)
-
Step 600
600
#3C70CC
oklch(55.7% 0.153 260.9)
-
Step 700
700 (this color)
#3564B8
oklch(51.5% 0.142 261)
-
Step 800
800
#274C8F
oklch(42.7% 0.119 261.2)
-
Step 900
900
#244072
oklch(37.7% 0.092 261.1)
-
Step 950
950
#162643
oklch(27.1% 0.058 261.5)
#3564B8 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) | #396DBB | 0.026 |
| Deuteranopia (no green cones) | #1F61B6 | 0.020 |
| Tritanopia (no blue cones) | #007885 | 0.114 |
| Achromatopsia (no color) | #666666 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3564B8
#3564B8
oklch(51.5% 0.142 261)
- #866000
#866000
oklch(51.5% 0.106 81.5)
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 #3564B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- French Blue #436BAD ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.055
- Windows Blue #3778BF ΔE 0.055
- Dusky Blue #475F94 ΔE 0.058
- Muted Blue #3B719F ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.062
- Iris #6258C4 ΔE 0.064
Use #3564B8 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.