#3C75C5
Closest named color: Windows Blue (#3778BF). oklch(56.4% 0.138 257.3), rgb(60, 117, 197).
Aa
White text reads best on this color (4.62:1).
About this color
#3C75C5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.138 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.014 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.54:1 |
| White text | 4.62:1 |
Values
| HEX | #3C75C5 |
| RGB | rgb(60, 117, 197) |
| HSL | hsl(215, 54%, 50%) |
| OKLCH | oklch(56.4% 0.138 257.3) |
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 #3C75C5 | 4.62:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #3C75C5 | 4.54:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #3C75C5 text on white | 4.62:1 | AA | Lc 71.8 | Content text, not long reading |
| #3C75C5 text on black | 4.54:1 | AA | Lc -29.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C3E9
oklch(81% 0.061 256.9)
-
Step 400
400
#79A2DE
oklch(70.6% 0.099 257.8)
-
Step 500
500
#558AD5
oklch(63% 0.127 257.2)
-
Step 600
600 (this color)
#3C75C5
oklch(56.4% 0.138 257.3)
-
Step 700
700
#2C60A8
oklch(49.2% 0.128 257.2)
-
Step 800
800
#254E88
oklch(42.6% 0.107 257.5)
-
Step 900
900
#23426D
oklch(37.8% 0.083 257)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#3C75C5 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) | #507CC8 | 0.030 |
| Deuteranopia (no green cones) | #3A6FC3 | 0.017 |
| Tritanopia (no blue cones) | #008893 | 0.111 |
| Achromatopsia (no color) | #757575 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C75C5
#3C75C5
oklch(56.4% 0.138 257.3)
- #9C6B00
#9C6B00
oklch(56.5% 0.118 77.2)
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 #3C75C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.014
- French Blue #436BAD ΔE 0.042
- Mid Blue #276AB3 ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.045
- Nice Blue #107AB0 ΔE 0.046
- Water Blue #0E87CC ΔE 0.050
- Steel Blue #4682B4 ΔE 0.051
- Cool Blue #4984B8 ΔE 0.053
Use #3C75C5 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.