#3F4669
Closest named color: Dark Grey Blue (#29465B). oklch(40.4% 0.06 274.8), rgb(63, 70, 105).
Aa
White text reads best on this color (9.16:1).
About this color
#3F4669 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.060 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.040 away. White text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #3F4669 |
| RGB | rgb(63, 70, 105) |
| HSL | hsl(230, 25%, 33%) |
| OKLCH | oklch(40.4% 0.06 274.8) |
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 #3F4669 | 9.16:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #3F4669 | 2.29:1 | Fails | Lc 12.9 | Not readable |
| #3F4669 text on white | 9.16:1 | AAA | Lc 91.1 | Preferred for body text |
| #3F4669 text on black | 2.29:1 | Fails | Lc -11.3 | 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 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D5D8E6
oklch(88.4% 0.019 276.3)
-
Step 300
300
#B9BFD8
oklch(80.8% 0.036 274.9)
-
Step 400
400
#969EC4
oklch(70.6% 0.056 275.6)
-
Step 500
500
#7C86B5
oklch(63% 0.072 274.9)
-
Step 600
600
#6670A1
oklch(55.7% 0.077 274.8)
-
Step 700
700
#545D8A
oklch(49% 0.073 274.7)
-
Step 800
800 (this color)
#3F4669
oklch(40.4% 0.06 274.8)
-
Step 900
900
#3A405A
oklch(37.7% 0.045 274)
-
Step 950
950
#222535
oklch(26.9% 0.03 276)
#3F4669 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) | #3B4A6A | 0.013 |
| Deuteranopia (no green cones) | #374668 | 0.012 |
| Tritanopia (no blue cones) | #324D53 | 0.053 |
| Achromatopsia (no color) | #484848 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4669
#3F4669
oklch(40.4% 0.06 274.8)
- #534820
#534820
oklch(40.3% 0.059 94.2)
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 #3F4669, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.040
- Charcoal #264653 ΔE 0.053
- Dusk #4E5481 ΔE 0.059
- Light Navy #155084 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.062
- Dusty Grape #545775 ΔE 0.064
- Dark Slate Gray #2F4F4F ΔE 0.064
Use #3F4669 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.