#3F586F
Closest named color: YInMn Blue (#415A77). oklch(45% 0.049 246.9), rgb(63, 88, 111).
Aa
White text reads best on this color (7.40:1).
About this color
#3F586F is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.049 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.014 away. White text reads best on it, at 7.40:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.83:1 |
| White text | 7.40:1 |
Values
| HEX | #3F586F |
| RGB | rgb(63, 88, 111) |
| HSL | hsl(209, 28%, 34%) |
| OKLCH | oklch(45% 0.049 246.9) |
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 #3F586F | 7.40:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #3F586F | 2.83:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3F586F text on white | 7.40:1 | AAA | Lc 85.7 | Fine for body text |
| #3F586F text on black | 2.83:1 | Fails | Lc -16.4 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B2C3D2
oklch(80.9% 0.028 244.8)
-
Step 400
400
#8AA4BC
oklch(70.7% 0.046 246.3)
-
Step 500
500
#6D8DAB
oklch(63% 0.058 247.1)
-
Step 600
600
#557797
oklch(55.6% 0.063 247.5)
-
Step 700
700
#456480
oklch(49.1% 0.058 246.6)
-
Step 800
800 (this color)
#3F586F
oklch(45% 0.049 246.9)
-
Step 900
900
#314455
oklch(37.8% 0.038 246)
-
Step 950
950
#1D2832
oklch(27.1% 0.024 246.3)
#3F586F 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) | #4F5870 | 0.022 |
| Deuteranopia (no green cones) | #49536F | 0.019 |
| Tritanopia (no blue cones) | #2D5D60 | 0.040 |
| Achromatopsia (no color) | #555555 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F586F
#3F586F
oklch(45% 0.049 246.9)
- #685038
#685038
oklch(45% 0.049 66.1)
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 #3F586F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.014
- Dusty Grape #545775 ΔE 0.032
- Dusk #4E5481 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.043
- Slate #516572 ΔE 0.049
- Petrol #005F6A ΔE 0.049
- Denim #3B638C ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.056
Use #3F586F 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.