#3A3D5B
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.052 279.2), rgb(58, 61, 91).
Aa
White text reads best on this color (10.50:1).
About this color
#3A3D5B is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.052 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.035 away. White text reads best on it, at 10.50:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #3A3D5B |
| RGB | rgb(58, 61, 91) |
| HSL | hsl(235, 22%, 29%) |
| OKLCH | oklch(37.1% 0.052 279.2) |
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 #3A3D5B | 10.50:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #3A3D5B | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #3A3D5B text on white | 10.50:1 | AAA | Lc 94.4 | Preferred for body text |
| #3A3D5B text on black | 1.99:1 | Fails | Lc -8.2 | 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 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
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BBBFDA
oklch(81% 0.038 278.8)
-
Step 400
400
#989DC7
oklch(70.7% 0.062 279.4)
-
Step 500
500
#7F85B9
oklch(63.2% 0.078 278.8)
-
Step 600
600
#696EA5
oklch(55.7% 0.085 279.3)
-
Step 700
700
#575B8D
oklch(49% 0.08 279.5)
-
Step 800
800
#474B73
oklch(42.7% 0.066 278.8)
-
Step 900
900 (this color)
#3A3D5B
oklch(37.1% 0.052 279.2)
-
Step 950
950
#232536
oklch(27% 0.032 278.9)
#3A3D5B 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) | #34405C | 0.012 |
| Deuteranopia (no green cones) | #323E5A | 0.013 |
| Tritanopia (no blue cones) | #314348 | 0.046 |
| Achromatopsia (no color) | #3F3F3F | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3D5B
#3A3D5B
oklch(37.1% 0.052 279.2)
- #47401F
#47401F
oklch(37% 0.051 97.6)
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 #3A3D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.047
- Onyx #343A40 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.051
- Gunmetal #293241 ΔE 0.061
- Midnight Green #073B4C ΔE 0.065
Use #3A3D5B 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.