#3F596E
Closest named color: YInMn Blue (#415A77). oklch(45.2% 0.047 243.4), rgb(63, 89, 110).
Aa
White text reads best on this color (7.32:1).
About this color
#3F596E is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.047 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.015 away. White text reads best on it, at 7.32:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.86:1 |
| White text | 7.32:1 |
Values
| HEX | #3F596E |
| RGB | rgb(63, 89, 110) |
| HSL | hsl(207, 27%, 34%) |
| OKLCH | oklch(45.2% 0.047 243.4) |
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 #3F596E | 7.32:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #3F596E | 2.86:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #3F596E text on white | 7.32:1 | AAA | Lc 85.4 | Fine for body text |
| #3F596E 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
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B2C3D1
oklch(80.9% 0.027 242.8)
-
Step 400
400
#8AA4BA
oklch(70.6% 0.043 244)
-
Step 500
500
#6C8EA9
oklch(63.1% 0.056 242.7)
-
Step 600
600
#547894
oklch(55.7% 0.06 242.5)
-
Step 700
700
#44657E
oklch(49.2% 0.056 241.9)
-
Step 800
800 (this color)
#3F596E
oklch(45.2% 0.047 243.4)
-
Step 900
900
#314454
oklch(37.7% 0.037 244.4)
-
Step 950
950
#1D2831
oklch(27.1% 0.023 243.4)
#3F596E 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) | #50596F | 0.024 |
| Deuteranopia (no green cones) | #4A546E | 0.020 |
| Tritanopia (no blue cones) | #2E5E60 | 0.038 |
| Achromatopsia (no color) | #565656 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F596E
#3F596E
oklch(45.2% 0.047 243.4)
- #69503A
#69503A
oklch(45.2% 0.048 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 #3F596E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.015
- Dusty Grape #545775 ΔE 0.033
- Dusk #4E5481 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Slate #516572 ΔE 0.046
- Petrol #005F6A ΔE 0.047
- Denim #3B638C ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.058
Use #3F596E 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.