#3A4166
Closest named color: Dark Grey Blue (#29465B). oklch(38.6% 0.064 274.9), rgb(58, 65, 102).
Aa
White text reads best on this color (9.86:1).
About this color
#3A4166 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.064 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 9.86:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #3A4166 |
| RGB | rgb(58, 65, 102) |
| HSL | hsl(230, 28%, 31%) |
| OKLCH | oklch(38.6% 0.064 274.9) |
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 #3A4166 | 9.86:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #3A4166 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #3A4166 text on white | 9.86:1 | AAA | Lc 92.8 | Preferred for body text |
| #3A4166 text on black | 2.12:1 | Fails | Lc -9.6 | 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 900.
-
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
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#929DD1
oklch(70.6% 0.077 275)
-
Step 500
500
#7884C5
oklch(63% 0.099 275.2)
-
Step 600
600
#616DB1
oklch(55.5% 0.106 274.8)
-
Step 700
700
#515B98
oklch(49.1% 0.098 275.1)
-
Step 800
800
#424B7B
oklch(42.8% 0.08 274.5)
-
Step 900
900 (this color)
#3A4166
oklch(38.6% 0.064 274.9)
-
Step 950
950
#21253A
oklch(27.1% 0.04 275.2)
#3A4166 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) | #344568 | 0.014 |
| Deuteranopia (no green cones) | #314265 | 0.013 |
| Tritanopia (no blue cones) | #2C484E | 0.057 |
| Achromatopsia (no color) | #434343 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4166
#3A4166
oklch(38.6% 0.064 274.9)
- #4F4317
#4F4317
oklch(38.5% 0.063 93.9)
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 #3A4166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal #264653 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.062
- Charcoal Grey #3C4142 ΔE 0.063
- Light Navy #155084 ΔE 0.065
- Onyx #343A40 ΔE 0.066
Use #3A4166 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.