#3F548F
Closest named color: Denim Blue (#3B5B92). oklch(45.8% 0.1 267.6), rgb(63, 84, 143).
Aa
White text reads best on this color (7.30:1).
About this color
#3F548F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.100 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.020 away. White text reads best on it, at 7.30:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #3F548F |
| RGB | rgb(63, 84, 143) |
| HSL | hsl(224, 39%, 40%) |
| OKLCH | oklch(45.8% 0.1 267.6) |
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 #3F548F | 7.30:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #3F548F | 2.87:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #3F548F text on white | 7.30:1 | AAA | Lc 85.2 | Fine for body text |
| #3F548F text on black | 2.87:1 | Fails | Lc -16.8 | Dividers and decoration only |
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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#879FDB
oklch(70.7% 0.092 267.3)
-
Step 500
500
#6A86D2
oklch(63.2% 0.119 267.6)
-
Step 600
600
#526EBF
oklch(55.6% 0.13 267.7)
-
Step 700
700
#435CA5
oklch(49.2% 0.121 267.6)
-
Step 800
800 (this color)
#3F548F
oklch(45.8% 0.1 267.6)
-
Step 900
900
#2F3F6B
oklch(37.6% 0.078 267.5)
-
Step 950
950
#1C253F
oklch(27% 0.05 268.4)
#3F548F 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) | #3C5A91 | 0.017 |
| Deuteranopia (no green cones) | #32538E | 0.016 |
| Tritanopia (no blue cones) | #13616A | 0.090 |
| Achromatopsia (no color) | #565656 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F548F
#3F548F
oklch(45.8% 0.1 267.6)
- #6D5300
#6D5300
oklch(45.7% 0.093 87.6)
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 #3F548F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.020
- Twilight #4E518B ΔE 0.022
- Dusk Blue #26538D ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusk #4E5481 ΔE 0.030
- Dusky Blue #475F94 ΔE 0.035
- Denim #3B638C ΔE 0.045
- YInMn Blue #415A77 ΔE 0.048
Use #3F548F 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.