#3C4571
Closest named color: Dark Grey Blue (#29465B). oklch(40.4% 0.075 273.8), rgb(60, 69, 113).
Aa
White text reads best on this color (9.20:1).
About this color
#3C4571 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.048 away. White text reads best on it, at 9.20:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #3C4571 |
| RGB | rgb(60, 69, 113) |
| HSL | hsl(230, 31%, 34%) |
| OKLCH | oklch(40.4% 0.075 273.8) |
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 #3C4571 | 9.20:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #3C4571 | 2.28:1 | Fails | Lc 12.8 | Not readable |
| #3C4571 text on white | 9.20:1 | AAA | Lc 91.1 | Preferred for body text |
| #3C4571 text on black | 2.28:1 | Fails | Lc -11.2 | Not readable |
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 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B7BFDE
oklch(80.8% 0.045 273.9)
-
Step 400
400
#929ECD
oklch(70.7% 0.07 273.4)
-
Step 500
500
#7885C0
oklch(63% 0.09 274)
-
Step 600
600
#616EAC
oklch(55.5% 0.098 273.8)
-
Step 700
700
#515C94
oklch(49.1% 0.091 274.2)
-
Step 800
800 (this color)
#3C4571
oklch(40.4% 0.075 273.8)
-
Step 900
900
#383F61
oklch(37.7% 0.059 274.4)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#3C4571 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) | #354A73 | 0.016 |
| Deuteranopia (no green cones) | #314670 | 0.015 |
| Tritanopia (no blue cones) | #294E55 | 0.067 |
| Achromatopsia (no color) | #484848 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C4571
#3C4571
oklch(40.4% 0.075 273.8)
- #56470E
#56470E
oklch(40.2% 0.075 93.4)
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 #3C4571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.048
- Light Navy #155084 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.055
- Dusk #4E5481 ΔE 0.057
- Dusk Blue #26538D ΔE 0.057
- Cobalt #1E488F ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.060
Use #3C4571 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.