#3F5573
Closest named color: YInMn Blue (#415A77). oklch(44.5% 0.057 256.3), rgb(63, 85, 115).
Aa
White text reads best on this color (7.61:1).
About this color
#3F5573 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.057 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.016 away. White text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.75:1 |
| White text | 7.61:1 |
Values
| HEX | #3F5573 |
| RGB | rgb(63, 85, 115) |
| HSL | hsl(215, 29%, 35%) |
| OKLCH | oklch(44.5% 0.057 256.3) |
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 #3F5573 | 7.61:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #3F5573 | 2.75:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #3F5573 text on white | 7.61:1 | AAA | Lc 86.4 | Fine for body text |
| #3F5573 text on black | 2.75:1 | Fails | Lc -15.7 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B3C2D6
oklch(80.9% 0.033 255.6)
-
Step 400
400
#8BA2C2
oklch(70.6% 0.054 256.7)
-
Step 500
500
#6F8BB2
oklch(63% 0.067 256.7)
-
Step 600
600
#57759E
oklch(55.6% 0.073 256.4)
-
Step 700
700
#476287
oklch(49.1% 0.068 256.4)
-
Step 800
800 (this color)
#3F5573
oklch(44.5% 0.057 256.3)
-
Step 900
900
#324359
oklch(37.8% 0.044 255.1)
-
Step 950
950
#1D2734
oklch(26.9% 0.028 255.2)
#3F5573 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) | #4A5674 | 0.016 |
| Deuteranopia (no green cones) | #445172 | 0.013 |
| Tritanopia (no blue cones) | #2C5C5F | 0.051 |
| Achromatopsia (no color) | #545454 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5573
#3F5573
oklch(44.5% 0.057 256.3)
- #66502F
#66502F
oklch(44.6% 0.056 76.6)
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 #3F5573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.016
- Dusty Grape #545775 ΔE 0.032
- Dusk #4E5481 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.037
- Twilight #4E518B ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.050
- Denim #3B638C ΔE 0.051
- Dusk Blue #26538D ΔE 0.051
Use #3F5573 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.