#3F598F
Closest named color: Denim Blue (#3B5B92). oklch(46.9% 0.093 263.7), rgb(63, 89, 143).
Aa
White text reads best on this color (6.91:1).
About this color
#3F598F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.093 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.007 away. White text reads best on it, at 6.91:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #3F598F |
| RGB | rgb(63, 89, 143) |
| HSL | hsl(221, 39%, 40%) |
| OKLCH | oklch(46.9% 0.093 263.7) |
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 #3F598F | 6.91:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #3F598F | 3.03:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #3F598F text on white | 6.91:1 | AA | Lc 83.8 | Fine for body text |
| #3F598F text on black | 3.03:1 | AA large text | Lc -18.2 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B2C1DF
oklch(80.9% 0.046 264.3)
-
Step 400
400
#89A1CF
oklch(70.8% 0.073 263.2)
-
Step 500
500
#6C89C2
oklch(63.1% 0.093 263.3)
-
Step 600
600
#5472AE
oklch(55.6% 0.1 263.3)
-
Step 700
700 (this color)
#3F598F
oklch(46.9% 0.093 263.7)
-
Step 800
800
#394E79
oklch(42.7% 0.077 263.7)
-
Step 900
900
#314162
oklch(37.7% 0.061 264)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#3F598F 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) | #435E91 | 0.016 |
| Deuteranopia (no green cones) | #3A568E | 0.011 |
| Tritanopia (no blue cones) | #11656D | 0.084 |
| Achromatopsia (no color) | #5A5A5A | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F598F
#3F598F
oklch(46.9% 0.093 263.7)
- #735507
#735507
oklch(46.9% 0.093 84)
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 #3F598F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.007
- Dusky Blue #475F94 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.023
- Twilight #4E518B ΔE 0.028
- Dusk #4E5481 ΔE 0.029
- Denim #3B638C ΔE 0.031
- Dusk Blue #26538D ΔE 0.034
- YInMn Blue #415A77 ΔE 0.041
Use #3F598F 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.