#3F5569
Closest named color: YInMn Blue (#415A77). oklch(44% 0.043 246.4), rgb(63, 85, 105).
Aa
White text reads best on this color (7.73:1).
About this color
#3F5569 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.043 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.025 away. White text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #3F5569 |
| RGB | rgb(63, 85, 105) |
| HSL | hsl(209, 25%, 33%) |
| OKLCH | oklch(44% 0.043 246.4) |
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 #3F5569 | 7.73:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #3F5569 | 2.71:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #3F5569 text on white | 7.73:1 | AAA | Lc 86.8 | Fine for body text |
| #3F5569 text on black | 2.71:1 | Fails | Lc -15.3 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D0
oklch(81% 0.025 244.2)
-
Step 400
400
#8DA4B9
oklch(70.8% 0.04 246)
-
Step 500
500
#708DA7
oklch(63.1% 0.051 245.8)
-
Step 600
600
#587792
oklch(55.6% 0.055 245.3)
-
Step 700
700
#48647D
oklch(49.1% 0.052 246.1)
-
Step 800
800 (this color)
#3F5569
oklch(44% 0.043 246.4)
-
Step 900
900
#334453
oklch(37.8% 0.034 245.5)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#3F5569 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) | #4D556A | 0.020 |
| Deuteranopia (no green cones) | #485169 | 0.017 |
| Tritanopia (no blue cones) | #315A5C | 0.035 |
| Achromatopsia (no color) | #535353 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5569
#3F5569
oklch(44% 0.043 246.4)
- #634E39
#634E39
oklch(44% 0.043 66.3)
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 #3F5569, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.025
- Dusty Grape #545775 ΔE 0.038
- Dusk #4E5481 ΔE 0.048
- Petrol #005F6A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.051
- Slate #516572 ΔE 0.057
- Deep Teal #00555A ΔE 0.058
Use #3F5569 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.