#3F6586
Closest named color: Denim (#3B638C). oklch(49.3% 0.069 246), rgb(63, 101, 134).
Aa
White text reads best on this color (6.14:1).
About this color
#3F6586 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.069 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.014 away. White text reads best on it, at 6.14:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #3F6586 |
| RGB | rgb(63, 101, 134) |
| HSL | hsl(208, 36%, 39%) |
| OKLCH | oklch(49.3% 0.069 246) |
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 #3F6586 | 6.14:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #3F6586 | 3.41:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #3F6586 text on white | 6.14:1 | AA | Lc 80.6 | Fine for body text |
| #3F6586 text on black | 3.41:1 | AA large text | Lc -21.3 | 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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE5
oklch(88.6% 0.018 245.4)
-
Step 300
300
#B0C3D5
oklch(80.8% 0.033 246.8)
-
Step 400
400
#86A4C0
oklch(70.6% 0.053 246.8)
-
Step 500
500
#678EB1
oklch(63.1% 0.068 246.2)
-
Step 600
600
#4E789C
oklch(55.7% 0.073 245.5)
-
Step 700
700 (this color)
#3F6586
oklch(49.3% 0.069 246)
-
Step 800
800
#34526C
oklch(42.7% 0.056 245.8)
-
Step 900
900
#2E4458
oklch(37.7% 0.044 246.7)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#3F6586 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) | #576688 | 0.031 |
| Deuteranopia (no green cones) | #4E5E85 | 0.026 |
| Tritanopia (no blue cones) | #196D70 | 0.059 |
| Achromatopsia (no color) | #626262 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6586
#3F6586
oklch(49.3% 0.069 246)
- #7C5935
#7C5935
oklch(49.3% 0.069 65.8)
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 #3F6586, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.014
- Dusky Blue #475F94 ΔE 0.034
- YInMn Blue #415A77 ΔE 0.036
- Slate #516572 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.041
- Peacock Blue #016795 ΔE 0.041
- Muted Blue #3B719F ΔE 0.046
Use #3F6586 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.