#3B405D
Closest named color: Dark Grey Blue (#29465B). oklch(38% 0.05 276.2), rgb(59, 64, 93).
Aa
White text reads best on this color (10.10:1).
About this color
#3B405D is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.050 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 10.10:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #3B405D |
| RGB | rgb(59, 64, 93) |
| HSL | hsl(231, 22%, 30%) |
| OKLCH | oklch(38% 0.05 276.2) |
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 #3B405D | 10.10:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #3B405D | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #3B405D text on white | 10.10:1 | AAA | Lc 93.4 | Preferred for body text |
| #3B405D text on black | 2.07:1 | Fails | Lc -9.1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D5D8E7
oklch(88.4% 0.021 276.9)
-
Step 300
300
#BABFD9
oklch(80.9% 0.037 276.9)
-
Step 400
400
#969EC7
oklch(70.7% 0.061 276.1)
-
Step 500
500
#7D86B8
oklch(63.2% 0.076 276.1)
-
Step 600
600
#666FA4
oklch(55.6% 0.083 276)
-
Step 700
700
#555D8D
oklch(49.2% 0.077 275.9)
-
Step 800
800
#454C72
oklch(42.7% 0.064 275.4)
-
Step 900
900 (this color)
#3B405D
oklch(38% 0.05 276.2)
-
Step 950
950
#222536
oklch(27% 0.032 276.3)
#3B405D 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) | #37435E | 0.010 |
| Deuteranopia (no green cones) | #35405C | 0.009 |
| Tritanopia (no blue cones) | #32464A | 0.046 |
| Achromatopsia (no color) | #424242 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B405D
#3B405D
oklch(38% 0.05 276.2)
- #4A4222
#4A4222
oklch(37.9% 0.05 95.7)
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 #3B405D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.052
- Onyx #343A40 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.058
- Dark Slate Gray #2F4F4F ΔE 0.062
- Twilight Blue #0A437A ΔE 0.066
Use #3B405D 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.