#3F536D
Closest named color: YInMn Blue (#415A77). oklch(43.7% 0.05 255.2), rgb(63, 83, 109).
Aa
White text reads best on this color (7.86:1).
About this color
#3F536D is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.050 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.024 away. White text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #3F536D |
| RGB | rgb(63, 83, 109) |
| HSL | hsl(214, 27%, 34%) |
| OKLCH | oklch(43.7% 0.05 255.2) |
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 #3F536D | 7.86:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #3F536D | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #3F536D text on white | 7.86:1 | AAA | Lc 87.3 | Fine for body text |
| #3F536D text on black | 2.66:1 | Fails | Lc -14.9 | Not readable |
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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8EA2BE
oklch(70.6% 0.047 256.8)
-
Step 500
500
#718CAE
oklch(63.2% 0.06 254.4)
-
Step 600
600
#5A7599
oklch(55.6% 0.065 255.8)
-
Step 700
700
#496283
oklch(49% 0.061 255.6)
-
Step 800
800 (this color)
#3F536D
oklch(43.7% 0.05 255.2)
-
Step 900
900
#344356
oklch(37.8% 0.038 254.6)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#3F536D 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) | #49546E | 0.015 |
| Deuteranopia (no green cones) | #44506C | 0.010 |
| Tritanopia (no blue cones) | #2F595C | 0.044 |
| Achromatopsia (no color) | #525252 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F536D
#3F536D
oklch(43.7% 0.05 255.2)
- #624E32
#624E32
oklch(43.7% 0.05 75.2)
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 #3F536D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.024
- Dusty Grape #545775 ΔE 0.036
- Dusk #4E5481 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.056
- Petrol #005F6A ΔE 0.056
- Light Navy #155084 ΔE 0.057
Use #3F536D 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.