#3F596D
Closest named color: YInMn Blue (#415A77). oklch(45.1% 0.045 242.1), rgb(63, 89, 109).
Aa
White text reads best on this color (7.33:1).
About this color
#3F596D is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.045 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.017 away. White text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #3F596D |
| RGB | rgb(63, 89, 109) |
| HSL | hsl(206, 27%, 34%) |
| OKLCH | oklch(45.1% 0.045 242.1) |
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 #3F596D | 7.33:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #3F596D | 2.86:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #3F596D text on white | 7.33:1 | AAA | Lc 85.5 | Fine for body text |
| #3F596D text on black | 2.86:1 | Fails | Lc -16.6 | 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
#E6EBEF
oklch(93.7% 0.008 241.7)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D1
oklch(80.9% 0.027 242.8)
-
Step 400
400
#8AA4B9
oklch(70.6% 0.042 242.7)
-
Step 500
500
#6D8EA8
oklch(63.1% 0.054 242.4)
-
Step 600
600
#547893
oklch(55.6% 0.059 241.5)
-
Step 700
700
#44657D
oklch(49.1% 0.054 240.8)
-
Step 800
800 (this color)
#3F596D
oklch(45.1% 0.045 242.1)
-
Step 900
900
#314453
oklch(37.7% 0.035 242.6)
-
Step 950
950
#1D2831
oklch(27.1% 0.023 243.4)
#3F596D 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) | #51596E | 0.025 |
| Deuteranopia (no green cones) | #4A546D | 0.020 |
| Tritanopia (no blue cones) | #2E5E60 | 0.036 |
| Achromatopsia (no color) | #565656 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F596D
#3F596D
oklch(45.1% 0.045 242.1)
- #68503B
#68503B
oklch(45.1% 0.046 62.5)
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 #3F596D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.017
- Dusty Grape #545775 ΔE 0.034
- Dusk #4E5481 ΔE 0.046
- Slate #516572 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.046
- Petrol #005F6A ΔE 0.047
- Denim #3B638C ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.059
Use #3F596D 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.