#3F4672
Closest named color: Dark Grey Blue (#29465B). oklch(40.9% 0.074 275.7), rgb(63, 70, 114).
Aa
White text reads best on this color (9.01:1).
About this color
#3F4672 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.052 away. White text reads best on it, at 9.01:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.33:1 |
| White text | 9.01:1 |
Values
| HEX | #3F4672 |
| RGB | rgb(63, 70, 114) |
| HSL | hsl(232, 29%, 35%) |
| OKLCH | oklch(40.9% 0.074 275.7) |
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 #3F4672 | 9.01:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #3F4672 | 2.33:1 | Fails | Lc 13.3 | Not readable |
| #3F4672 text on white | 9.01:1 | AAA | Lc 90.6 | Preferred for body text |
| #3F4672 text on black | 2.33:1 | Fails | Lc -11.7 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B8BFDD
oklch(80.9% 0.043 275)
-
Step 400
400
#949DCC
oklch(70.6% 0.07 276)
-
Step 500
500
#7A85BF
oklch(63.1% 0.088 275.3)
-
Step 600
600
#646EAB
oklch(55.6% 0.095 275.8)
-
Step 700
700
#535C93
oklch(49.2% 0.089 275.6)
-
Step 800
800 (this color)
#3F4672
oklch(40.9% 0.074 275.7)
-
Step 900
900
#393F60
oklch(37.7% 0.057 275.4)
-
Step 950
950
#212538
oklch(27% 0.036 274.6)
#3F4672 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) | #374B74 | 0.017 |
| Deuteranopia (no green cones) | #334771 | 0.017 |
| Tritanopia (no blue cones) | #2E4F56 | 0.067 |
| Achromatopsia (no color) | #494949 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4672
#3F4672
oklch(40.9% 0.074 275.7)
- #564912
#564912
oklch(40.8% 0.074 95.4)
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 #3F4672, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.052
- Light Navy #155084 ΔE 0.052
- Dusk #4E5481 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight #4E518B ΔE 0.055
- Dusk Blue #26538D ΔE 0.056
- Twilight Blue #0A437A ΔE 0.057
- Cobalt #1E488F ΔE 0.059
Use #3F4672 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.