#3B445F
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.048 269.9), rgb(59, 68, 95).
Aa
White text reads best on this color (9.64:1).
About this color
#3B445F is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.048 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 9.64:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #3B445F |
| RGB | rgb(59, 68, 95) |
| HSL | hsl(225, 23%, 30%) |
| OKLCH | oklch(39% 0.048 269.9) |
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 #3B445F | 9.64:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #3B445F | 2.17:1 | Fails | Lc 11.6 | Not readable |
| #3B445F text on white | 9.64:1 | AAA | Lc 92.3 | Preferred for body text |
| #3B445F text on black | 2.17:1 | Fails | Lc -10.1 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B7C0D8
oklch(80.8% 0.035 269.2)
-
Step 400
400
#929FC5
oklch(70.6% 0.058 270.1)
-
Step 500
500
#7888B6
oklch(63.2% 0.072 269.5)
-
Step 600
600
#6171A2
oklch(55.6% 0.079 269.9)
-
Step 700
700
#505E8B
oklch(49% 0.075 270.3)
-
Step 800
800
#424D71
oklch(42.7% 0.062 270.6)
-
Step 900
900 (this color)
#3B445F
oklch(39% 0.048 269.9)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#3B445F 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) | #3B4660 | 0.006 |
| Deuteranopia (no green cones) | #38435E | 0.006 |
| Tritanopia (no blue cones) | #30494D | 0.043 |
| Achromatopsia (no color) | #454545 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B445F
#3B445F
oklch(39% 0.048 269.9)
- #4F4426
#4F4426
oklch(39% 0.048 90)
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 #3B445F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.053
- Onyx #343A40 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.058
- Twilight Blue #0A437A ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.067
Use #3B445F 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.