#3F496B
Closest named color: Dark Grey Blue (#29465B). oklch(41.2% 0.059 271.1), rgb(63, 73, 107).
Aa
White text reads best on this color (8.83:1).
About this color
#3F496B is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.059 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.042 away. White text reads best on it, at 8.83:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #3F496B |
| RGB | rgb(63, 73, 107) |
| HSL | hsl(226, 26%, 33%) |
| OKLCH | oklch(41.2% 0.059 271.1) |
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 #3F496B | 8.83:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #3F496B | 2.37:1 | Fails | Lc 13.8 | Not readable |
| #3F496B text on white | 8.83:1 | AAA | Lc 90.2 | Preferred for body text |
| #3F496B text on black | 2.37:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B8C0D7
oklch(80.9% 0.034 270.4)
-
Step 400
400
#949FC4
oklch(70.7% 0.056 272)
-
Step 500
500
#7A87B5
oklch(63.1% 0.071 272)
-
Step 600
600
#6371A0
oklch(55.6% 0.075 271.1)
-
Step 700
700
#525E89
oklch(49% 0.071 271.7)
-
Step 800
800 (this color)
#3F496B
oklch(41.2% 0.059 271.1)
-
Step 900
900
#38405A
oklch(37.6% 0.046 270.9)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#3F496B 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) | #3E4C6C | 0.009 |
| Deuteranopia (no green cones) | #3A486A | 0.008 |
| Tritanopia (no blue cones) | #315055 | 0.053 |
| Achromatopsia (no color) | #4A4A4A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F496B
#3F496B
oklch(41.2% 0.059 271.1)
- #574A23
#574A23
oklch(41.3% 0.059 91.3)
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 #3F496B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.042
- Dusk #4E5481 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.052
- Charcoal #264653 ΔE 0.055
- Light Navy #155084 ΔE 0.055
- Dusty Grape #545775 ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.060
- Twilight #4E518B ΔE 0.060
Use #3F496B 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.