#3F5377
Closest named color: YInMn Blue (#415A77). oklch(44.2% 0.065 261.7), rgb(63, 83, 119).
Aa
White text reads best on this color (7.73:1).
About this color
#3F5377 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.065 and its hue 262°. 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 7.73:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #3F5377 |
| RGB | rgb(63, 83, 119) |
| HSL | hsl(219, 31%, 36%) |
| OKLCH | oklch(44.2% 0.065 261.7) |
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 #3F5377 | 7.73:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #3F5377 | 2.71:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #3F5377 text on white | 7.73:1 | AAA | Lc 86.8 | Fine for body text |
| #3F5377 text on black | 2.71:1 | Fails | Lc -15.3 | 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 800.
-
Step 50
50
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE7
oklch(88.6% 0.02 260.2)
-
Step 300
300
#B3C1DA
oklch(80.8% 0.039 262.1)
-
Step 400
400
#8CA1C7
oklch(70.6% 0.061 262.2)
-
Step 500
500
#708AB9
oklch(63.2% 0.077 262)
-
Step 600
600
#5873A5
oklch(55.6% 0.085 262.2)
-
Step 700
700
#48618D
oklch(49.2% 0.077 261.3)
-
Step 800
800 (this color)
#3F5377
oklch(44.2% 0.065 261.7)
-
Step 900
900
#33425D
oklch(37.8% 0.05 261.8)
-
Step 950
950
#1E2736
oklch(27.1% 0.031 260.5)
#3F5377 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) | #465679 | 0.014 |
| Deuteranopia (no green cones) | #405076 | 0.009 |
| Tritanopia (no blue cones) | #2A5B60 | 0.058 |
| Achromatopsia (no color) | #535353 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5377
#3F5377
oklch(44.2% 0.065 261.7)
- #654F26
#654F26
oklch(44.1% 0.065 81.3)
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 #3F5377, 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 0.028
- Light Navy Blue #2E5A88 ΔE 0.033
- Dusty Grape #545775 ΔE 0.034
- Twilight #4E518B ΔE 0.042
- Dusk Blue #26538D ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.045
- Light Navy #155084 ΔE 0.047
Use #3F5377 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.