#3F5372
Closest named color: YInMn Blue (#415A77). oklch(43.9% 0.057 259), rgb(63, 83, 114).
Aa
White text reads best on this color (7.80:1).
About this color
#3F5372 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.057 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.022 away. White text reads best on it, at 7.80:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #3F5372 |
| RGB | rgb(63, 83, 114) |
| HSL | hsl(216, 29%, 35%) |
| OKLCH | oklch(43.9% 0.057 259) |
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 #3F5372 | 7.80:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3F5372 | 2.69:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #3F5372 text on white | 7.80:1 | AAA | Lc 87.0 | Fine for body text |
| #3F5372 text on black | 2.69:1 | Fails | Lc -15.1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C2D7
oklch(81% 0.033 258.4)
-
Step 400
400
#8DA2C2
oklch(70.7% 0.053 258.7)
-
Step 500
500
#718BB3
oklch(63.2% 0.068 258.9)
-
Step 600
600
#59749F
oklch(55.6% 0.074 259.5)
-
Step 700
700
#496188
oklch(49% 0.069 259.9)
-
Step 800
800 (this color)
#3F5372
oklch(43.9% 0.057 259)
-
Step 900
900
#334259
oklch(37.6% 0.044 258.8)
-
Step 950
950
#1E2734
oklch(27% 0.028 257.5)
#3F5372 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) | #485573 | 0.015 |
| Deuteranopia (no green cones) | #425071 | 0.009 |
| Tritanopia (no blue cones) | #2C5A5E | 0.051 |
| Achromatopsia (no color) | #525252 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5372
#3F5372
oklch(43.9% 0.057 259)
- #634F2C
#634F2C
oklch(44% 0.057 80.4)
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 #3F5372, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.022
- Dusk #4E5481 ΔE 0.034
- Dusty Grape #545775 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.039
- Twilight #4E518B ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.051
- Light Navy #155084 ΔE 0.052
Use #3F5372 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.