#3A4573
Closest named color: Light Navy (#155084). oklch(40.3% 0.079 272.3), rgb(58, 69, 115).
Aa
White text reads best on this color (9.21:1).
About this color
#3A4573 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.048 away. White text reads best on it, at 9.21:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #3A4573 |
| RGB | rgb(58, 69, 115) |
| HSL | hsl(228, 33%, 34%) |
| OKLCH | oklch(40.3% 0.079 272.3) |
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 #3A4573 | 9.21:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #3A4573 | 2.27:1 | Fails | Lc 12.8 | Not readable |
| #3A4573 text on white | 9.21:1 | AAA | Lc 91.2 | Preferred for body text |
| #3A4573 text on black | 2.27:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D3D9EB
oklch(88.6% 0.026 271.1)
-
Step 300
300
#B6BFDF
oklch(80.8% 0.046 272.9)
-
Step 400
400
#909ECF
oklch(70.6% 0.074 272.1)
-
Step 500
500
#7686C3
oklch(63.2% 0.094 272.2)
-
Step 600
600
#5F6FAF
oklch(55.7% 0.101 272.1)
-
Step 700
700
#4E5C97
oklch(49.1% 0.096 272.3)
-
Step 800
800 (this color)
#3A4573
oklch(40.3% 0.079 272.3)
-
Step 900
900
#363F62
oklch(37.6% 0.061 272.2)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#3A4573 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) | #344A75 | 0.016 |
| Deuteranopia (no green cones) | #2E4572 | 0.016 |
| Tritanopia (no blue cones) | #244F56 | 0.071 |
| Achromatopsia (no color) | #484848 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4573
#3A4573
oklch(40.3% 0.079 272.3)
- #584707
#584707
oklch(40.4% 0.079 92.3)
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 #3A4573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.053
- Cobalt #1E488F ΔE 0.053
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.057
- Dusk #4E5481 ΔE 0.058
Use #3A4573 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.