#3F5865
Closest named color: YInMn Blue (#415A77). oklch(44.5% 0.037 231.3), rgb(63, 88, 101).
Aa
White text reads best on this color (7.51:1).
About this color
#3F5865 is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.037 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.030 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #3F5865 |
| RGB | rgb(63, 88, 101) |
| HSL | hsl(201, 23%, 32%) |
| OKLCH | oklch(44.5% 0.037 231.3) |
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 #3F5865 | 7.51:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #3F5865 | 2.79:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #3F5865 text on white | 7.51:1 | AAA | Lc 86.1 | Fine for body text |
| #3F5865 text on black | 2.79:1 | Fails | Lc -16.0 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBE0
oklch(88.6% 0.012 231.7)
-
Step 300
300
#B3C3CC
oklch(80.8% 0.022 232.2)
-
Step 400
400
#8CA5B3
oklch(70.7% 0.035 232.5)
-
Step 500
500
#6F8FA0
oklch(63.2% 0.044 231.5)
-
Step 600
600
#56798B
oklch(55.6% 0.049 231.1)
-
Step 700
700
#466676
oklch(49.2% 0.045 230.5)
-
Step 800
800 (this color)
#3F5865
oklch(44.5% 0.037 231.3)
-
Step 900
900
#32454E
oklch(37.8% 0.029 228.7)
-
Step 950
950
#1D282E
oklch(26.9% 0.019 232.2)
#3F5865 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) | #525766 | 0.027 |
| Deuteranopia (no green cones) | #4C5365 | 0.022 |
| Tritanopia (no blue cones) | #325C5C | 0.027 |
| Achromatopsia (no color) | #555555 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5865
#3F5865
oklch(44.5% 0.037 231.3)
- #654E41
#654E41
oklch(44.4% 0.037 50.9)
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 #3F5865, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.030
- Dusty Grape #545775 ΔE 0.042
- Petrol #005F6A ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.048
- Slate #516572 ΔE 0.050
- Deep Teal #00555A ΔE 0.055
- Dark Green Blue #1F6357 ΔE 0.056
- Dusk #4E5481 ΔE 0.057
Use #3F5865 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.