#3A5378
Closest named color: YInMn Blue (#415A77). oklch(43.9% 0.069 258), rgb(58, 83, 120).
Aa
White text reads best on this color (7.81:1).
About this color
#3A5378 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.069 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.025 away. White text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #3A5378 |
| RGB | rgb(58, 83, 120) |
| HSL | hsl(216, 35%, 35%) |
| OKLCH | oklch(43.9% 0.069 258) |
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 #3A5378 | 7.81:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3A5378 | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #3A5378 text on white | 7.81:1 | AAA | Lc 87.0 | Fine for body text |
| #3A5378 text on black | 2.68:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B1C2DB
oklch(80.9% 0.04 257.9)
-
Step 400
400
#88A2C9
oklch(70.7% 0.064 258.3)
-
Step 500
500
#6A8BBB
oklch(63.1% 0.082 257.7)
-
Step 600
600
#5274A7
oklch(55.5% 0.089 258.3)
-
Step 700
700
#42618F
oklch(49% 0.083 258.1)
-
Step 800
800 (this color)
#3A5378
oklch(43.9% 0.069 258)
-
Step 900
900
#30425E
oklch(37.7% 0.054 259)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#3A5378 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) | #45557A | 0.017 |
| Deuteranopia (no green cones) | #3D4F77 | 0.012 |
| Tritanopia (no blue cones) | #1E5B60 | 0.061 |
| Achromatopsia (no color) | #525252 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5378
#3A5378
oklch(43.9% 0.069 258)
- #674D22
#674D22
oklch(43.8% 0.069 77.8)
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 #3A5378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.030
- Dusk #4E5481 ΔE 0.032
- Dusk Blue #26538D ΔE 0.039
- Dusty Grape #545775 ΔE 0.040
- Light Navy #155084 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.042
- Twilight #4E518B ΔE 0.044
Use #3A5378 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.