#3A405E
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.052 275), rgb(58, 64, 94).
Aa
White text reads best on this color (10.12:1).
About this color
#3A405E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.052 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 10.12:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.07:1 |
| White text | 10.12:1 |
Values
| HEX | #3A405E |
| RGB | rgb(58, 64, 94) |
| HSL | hsl(230, 24%, 30%) |
| OKLCH | oklch(37.9% 0.052 275) |
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 #3A405E | 10.12:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #3A405E | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #3A405E text on white | 10.12:1 | AAA | Lc 93.5 | Preferred for body text |
| #3A405E text on black | 2.07:1 | Fails | Lc -9.0 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E8
oklch(88.5% 0.022 277.5)
-
Step 300
300
#B9BFDA
oklch(80.9% 0.039 275.6)
-
Step 400
400
#959EC8
oklch(70.7% 0.062 275.3)
-
Step 500
500
#7B86BA
oklch(63.1% 0.079 274.7)
-
Step 600
600
#646FA6
oklch(55.6% 0.087 274.6)
-
Step 700
700
#535D8E
oklch(49.1% 0.08 274.3)
-
Step 800
800
#444C74
oklch(42.8% 0.067 274.6)
-
Step 900
900 (this color)
#3A405E
oklch(37.9% 0.052 275)
-
Step 950
950
#222537
oklch(27% 0.034 276.6)
#3A405E 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) | #36435F | 0.010 |
| Deuteranopia (no green cones) | #34405D | 0.009 |
| Tritanopia (no blue cones) | #30464B | 0.046 |
| Achromatopsia (no color) | #424242 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A405E
#3A405E
oklch(37.9% 0.052 275)
- #4B4220
#4B4220
oklch(38% 0.052 94.9)
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 #3A405E, 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 0.050
- Dark Blue Grey #1F3B4D ΔE 0.051
- Onyx #343A40 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.063
- Twilight Blue #0A437A ΔE 0.063
Use #3A405E 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.