#3F5C8B
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.084 259.7), rgb(63, 92, 139).
Aa
White text reads best on this color (6.74:1).
About this color
#3F5C8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.084 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.013 away. White text reads best on it, at 6.74:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #3F5C8B |
| RGB | rgb(63, 92, 139) |
| HSL | hsl(217, 38%, 40%) |
| OKLCH | oklch(47.4% 0.084 259.7) |
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 #3F5C8B | 6.74:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #3F5C8B | 3.11:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #3F5C8B text on white | 6.74:1 | AA | Lc 83.1 | Fine for body text |
| #3F5C8B text on black | 3.11:1 | AA large text | Lc -18.8 | 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 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B1C2DC
oklch(81% 0.041 258.8)
-
Step 400
400
#89A2CA
oklch(70.8% 0.065 259.7)
-
Step 500
500
#6B8ABC
oklch(63% 0.084 259.7)
-
Step 600
600
#5374A8
oklch(55.6% 0.09 259.2)
-
Step 700
700 (this color)
#3F5C8B
oklch(47.4% 0.084 259.7)
-
Step 800
800
#384F75
oklch(42.7% 0.07 260.1)
-
Step 900
900
#30425E
oklch(37.7% 0.054 259)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#3F5C8B 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) | #495F8D | 0.016 |
| Deuteranopia (no green cones) | #40588A | 0.011 |
| Tritanopia (no blue cones) | #16666D | 0.074 |
| Achromatopsia (no color) | #5B5B5B | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5C8B
#3F5C8B
oklch(47.4% 0.084 259.7)
- #75561C
#75561C
oklch(47.5% 0.084 79.5)
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 #3F5C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.013
- Dusky Blue #475F94 ΔE 0.020
- Denim #3B638C ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.021
- Dusk #4E5481 ΔE 0.029
- YInMn Blue #415A77 ΔE 0.032
- Twilight #4E518B ΔE 0.035
- Dusk Blue #26538D ΔE 0.041
Use #3F5C8B 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.