#3F4465
Closest named color: Dark Grey Blue (#29465B). oklch(39.7% 0.056 276.9), rgb(63, 68, 101).
Aa
White text reads best on this color (9.43:1).
About this color
#3F4465 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.056 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.037 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #3F4465 |
| RGB | rgb(63, 68, 101) |
| HSL | hsl(232, 23%, 32%) |
| OKLCH | oklch(39.7% 0.056 276.9) |
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 #3F4465 | 9.43:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3F4465 | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #3F4465 text on white | 9.43:1 | AAA | Lc 91.8 | Preferred for body text |
| #3F4465 text on black | 2.22:1 | Fails | Lc -10.6 | 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
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#B9BFDC
oklch(80.9% 0.041 276.2)
-
Step 400
400
#959DCB
oklch(70.6% 0.068 276.8)
-
Step 500
500
#7C85BD
oklch(63.1% 0.085 276.7)
-
Step 600
600
#656EAA
oklch(55.7% 0.094 276.4)
-
Step 700
700
#545B92
oklch(49% 0.088 277.1)
-
Step 800
800
#454B76
oklch(42.7% 0.072 276.9)
-
Step 900
900 (this color)
#3F4465
oklch(39.7% 0.056 276.9)
-
Step 950
950
#222538
oklch(27.1% 0.036 276.8)
#3F4465 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) | #3A4866 | 0.013 |
| Deuteranopia (no green cones) | #374564 | 0.012 |
| Tritanopia (no blue cones) | #344A50 | 0.049 |
| Achromatopsia (no color) | #464646 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4465
#3F4465
oklch(39.7% 0.056 276.9)
- #4F4721
#4F4721
oklch(39.7% 0.057 97.7)
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 #3F4465, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.037
- Charcoal #264653 ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.060
- Dark Slate Gray #2F4F4F ΔE 0.063
- Twilight Blue #0A437A ΔE 0.064
- Light Navy #155084 ΔE 0.066
- Dusk #4E5481 ΔE 0.066
- YInMn Blue #415A77 ΔE 0.067
Use #3F4465 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.