#3F5491
Closest named color: Denim Blue (#3B5B92). oklch(45.9% 0.103 267.9), rgb(63, 84, 145).
Aa
White text reads best on this color (7.27:1).
About this color
#3F5491 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.103 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 7.27:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.88:1 |
| White text | 7.27:1 |
Values
| HEX | #3F5491 |
| RGB | rgb(63, 84, 145) |
| HSL | hsl(225, 39%, 41%) |
| OKLCH | oklch(45.9% 0.103 267.9) |
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 #3F5491 | 7.27:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #3F5491 | 2.88:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #3F5491 text on white | 7.27:1 | AAA | Lc 85.1 | Fine for body text |
| #3F5491 text on black | 2.88:1 | Fails | Lc -16.9 | 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 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D1D9EC
oklch(88.5% 0.028 267.5)
-
Step 300
300
#B3C0E2
oklch(80.9% 0.05 268.8)
-
Step 400
400
#8B9FD3
oklch(70.6% 0.08 268.1)
-
Step 500
500
#6F87C7
oklch(63.1% 0.101 267.8)
-
Step 600
600
#5770B4
oklch(55.7% 0.11 267.5)
-
Step 700
700 (this color)
#3F5491
oklch(45.9% 0.103 267.9)
-
Step 800
800
#3B4C7E
oklch(42.7% 0.086 268.4)
-
Step 900
900
#324065
oklch(37.7% 0.066 267.4)
-
Step 950
950
#1D263B
oklch(27.1% 0.041 266)
#3F5491 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) | #3A5B93 | 0.020 |
| Deuteranopia (no green cones) | #305390 | 0.018 |
| Tritanopia (no blue cones) | #10616B | 0.092 |
| Achromatopsia (no color) | #575757 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5491
#3F5491
oklch(45.9% 0.103 267.9)
- #6E5400
#6E5400
oklch(46% 0.094 87.8)
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 #3F5491, 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 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Dusk #4E5481 ΔE 0.033
- Dusky Blue #475F94 ΔE 0.034
- Denim #3B638C ΔE 0.046
- Light Navy #155084 ΔE 0.049
Use #3F5491 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.