#3F5665
Closest named color: YInMn Blue (#415A77). oklch(44% 0.037 237.3), rgb(63, 86, 101).
Aa
White text reads best on this color (7.69:1).
About this color
#3F5665 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.037 and its hue 237°. 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 7.69:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.73:1 |
| White text | 7.69:1 |
Values
| HEX | #3F5665 |
| RGB | rgb(63, 86, 101) |
| HSL | hsl(204, 23%, 32%) |
| OKLCH | oklch(44% 0.037 237.3) |
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 #3F5665 | 7.69:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #3F5665 | 2.73:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #3F5665 text on white | 7.69:1 | AAA | Lc 86.7 | Fine for body text |
| #3F5665 text on black | 2.73:1 | Fails | Lc -15.4 | 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
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE0
oklch(88.4% 0.012 239.9)
-
Step 300
300
#B4C3CD
oklch(80.9% 0.022 236.8)
-
Step 400
400
#8DA4B4
oklch(70.6% 0.035 238.4)
-
Step 500
500
#708EA2
oklch(63.1% 0.045 237.6)
-
Step 600
600
#58788D
oklch(55.6% 0.049 237.6)
-
Step 700
700
#486577
oklch(49.1% 0.045 236.1)
-
Step 800
800 (this color)
#3F5665
oklch(44% 0.037 237.3)
-
Step 900
900
#33444F
oklch(37.7% 0.029 236.9)
-
Step 950
950
#1E282E
oklch(27% 0.018 234.7)
#3F5665 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) | #4F5566 | 0.023 |
| Deuteranopia (no green cones) | #4A5165 | 0.021 |
| Tritanopia (no blue cones) | #325A5B | 0.029 |
| Achromatopsia (no color) | #535353 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5665
#3F5665
oklch(44% 0.037 237.3)
- #634E3E
#634E3E
oklch(44.1% 0.038 58.9)
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 #3F5665, 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
- Dark Slate Gray #2F4F4F ΔE 0.046
- Petrol #005F6A ΔE 0.047
- Deep Teal #00555A ΔE 0.055
- Dusk #4E5481 ΔE 0.055
- Slate #516572 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.057
Use #3F5665 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.