#3F4E6F
Closest named color: YInMn Blue (#415A77). oklch(42.6% 0.058 265.2), rgb(63, 78, 111).
Aa
White text reads best on this color (8.29:1).
About this color
#3F4E6F is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.058 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.036 away. White text reads best on it, at 8.29:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #3F4E6F |
| RGB | rgb(63, 78, 111) |
| HSL | hsl(221, 28%, 34%) |
| OKLCH | oklch(42.6% 0.058 265.2) |
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 #3F4E6F | 8.29:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #3F4E6F | 2.53:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #3F4E6F text on white | 8.29:1 | AAA | Lc 88.6 | Fine for body text |
| #3F4E6F text on black | 2.53:1 | Fails | Lc -13.6 | 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 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
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400
#90A1C4
oklch(70.8% 0.055 264.7)
-
Step 500
500
#7589B4
oklch(63.1% 0.069 265.1)
-
Step 600
600
#5E72A0
oklch(55.5% 0.076 265.9)
-
Step 700
700
#4D6089
oklch(49.1% 0.07 264.9)
-
Step 800
800 (this color)
#3F4E6F
oklch(42.6% 0.058 265.2)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#3F4E6F 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) | #425170 | 0.010 |
| Deuteranopia (no green cones) | #3E4C6E | 0.006 |
| Tritanopia (no blue cones) | #2F555A | 0.052 |
| Achromatopsia (no color) | #4E4E4E | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4E6F
#3F4E6F
oklch(42.6% 0.058 265.2)
- #5D4C27
#5D4C27
oklch(42.5% 0.058 85.2)
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 #3F4E6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.036
- Dusk #4E5481 ΔE 0.040
- Dusty Grape #545775 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.049
- Light Navy #155084 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.051
- Twilight #4E518B ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.053
Use #3F4E6F 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.