#3574D4
Closest named color: Windows Blue (#3778BF). oklch(56.9% 0.161 258.8), rgb(53, 116, 212).
Aa
Black text reads best on this color (4.60:1).
About this color
#3574D4 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.161 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #3574D4 |
| RGB | rgb(53, 116, 212) |
| HSL | hsl(216, 65%, 52%) |
| OKLCH | oklch(56.9% 0.161 258.8) |
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 #3574D4 | 4.56:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #3574D4 | 4.60:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #3574D4 text on white | 4.56:1 | AA | Lc 71.3 | Content text, not long reading |
| #3574D4 text on black | 4.60:1 | AA | Lc -30.4 | Non-text elements, placeholder text |
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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DAF4
oklch(88.4% 0.04 258.8)
-
Step 300
300
#A5C2F0
oklch(80.9% 0.073 259.5)
-
Step 400
400
#73A2E9
oklch(70.8% 0.116 258.4)
-
Step 500
500
#4E88E2
oklch(63% 0.149 258.9)
-
Step 600
600 (this color)
#3574D4
oklch(56.9% 0.161 258.8)
-
Step 700
700
#245DB4
oklch(49.1% 0.151 259)
-
Step 800
800
#1F4D92
oklch(42.8% 0.125 258.6)
-
Step 900
900
#1F4074
oklch(37.6% 0.097 259.2)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#3574D4 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) | #427DD8 | 0.028 |
| Deuteranopia (no green cones) | #1E6FD2 | 0.022 |
| Tritanopia (no blue cones) | #008B9A | 0.126 |
| Achromatopsia (no color) | #767676 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3574D4
#3574D4
oklch(56.9% 0.161 258.8)
- #9C6D00
#9C6D00
oklch(56.9% 0.118 78.8)
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 #3574D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Royal Blue #4169E1 ΔE 0.036
- Cerulean Blue #056EEE ΔE 0.049
- Water Blue #0E87CC ΔE 0.056
- Mid Blue #276AB3 ΔE 0.058
- French Blue #436BAD ΔE 0.061
- Clear Blue #247AFD ΔE 0.062
- Neon Blue #4361EE ΔE 0.064
Use #3574D4 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.