#3F526D
Closest named color: YInMn Blue (#415A77). oklch(43.4% 0.051 257.2), rgb(63, 82, 109).
Aa
White text reads best on this color (7.95:1).
About this color
#3F526D is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.051 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.027 away. White text reads best on it, at 7.95:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.63:1 |
| White text | 7.95:1 |
Values
| HEX | #3F526D |
| RGB | rgb(63, 82, 109) |
| HSL | hsl(215, 27%, 34%) |
| OKLCH | oklch(43.4% 0.051 257.2) |
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 #3F526D | 7.95:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #3F526D | 2.63:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #3F526D text on white | 7.95:1 | AAA | Lc 87.6 | Fine for body text |
| #3F526D text on black | 2.63:1 | Fails | Lc -14.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
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
#B5C2D4
oklch(81% 0.029 256.5)
-
Step 400
400
#8EA2BF
oklch(70.7% 0.048 257.6)
-
Step 500
500
#728BAE
oklch(63% 0.06 256.8)
-
Step 600
600
#5A759A
oklch(55.6% 0.066 256.4)
-
Step 700
700
#4A6284
oklch(49.1% 0.062 257.1)
-
Step 800
800 (this color)
#3F526D
oklch(43.4% 0.051 257.2)
-
Step 900
900
#344257
oklch(37.6% 0.041 258.3)
-
Step 950
950
#1F2733
oklch(27.1% 0.025 258.3)
#3F526D 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) | #48536E | 0.014 |
| Deuteranopia (no green cones) | #434F6C | 0.010 |
| Tritanopia (no blue cones) | #2F585B | 0.045 |
| Achromatopsia (no color) | #515151 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F526D
#3F526D
oklch(43.4% 0.051 257.2)
- #614D30
#614D30
oklch(43.4% 0.051 76)
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 #3F526D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.027
- Dusty Grape #545775 ΔE 0.038
- Dusk #4E5481 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy #155084 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.056
Use #3F526D 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.