#3A517F
Closest named color: Light Navy Blue (#2E5A88). oklch(43.8% 0.081 263.2), rgb(58, 81, 127).
Aa
White text reads best on this color (7.88:1).
About this color
#3A517F is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.081 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.028 away. White text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #3A517F |
| RGB | rgb(58, 81, 127) |
| HSL | hsl(220, 37%, 36%) |
| OKLCH | oklch(43.8% 0.081 263.2) |
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 #3A517F | 7.88:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #3A517F | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #3A517F text on white | 7.88:1 | AAA | Lc 87.2 | Fine for body text |
| #3A517F text on black | 2.66:1 | Fails | Lc -14.9 | Not readable |
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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#88A1D1
oklch(70.8% 0.076 263.2)
-
Step 500
500
#6A89C5
oklch(63.1% 0.098 263)
-
Step 600
600
#5272B1
oklch(55.6% 0.105 263)
-
Step 700
700
#435F98
oklch(49.1% 0.098 263.4)
-
Step 800
800 (this color)
#3A517F
oklch(43.8% 0.081 263.2)
-
Step 900
900
#304163
oklch(37.7% 0.063 263.4)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#3A517F 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) | #3F5581 | 0.014 |
| Deuteranopia (no green cones) | #374F7E | 0.008 |
| Tritanopia (no blue cones) | #185B62 | 0.073 |
| Achromatopsia (no color) | #515151 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A517F
#3A517F
oklch(43.8% 0.081 263.2)
- #684D12
#684D12
oklch(43.8% 0.081 82.3)
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 #3A517F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.028
- Dusk Blue #26538D ΔE 0.029
- Dusk #4E5481 ΔE 0.030
- Twilight #4E518B ΔE 0.035
- Light Navy #155084 ΔE 0.035
- YInMn Blue #415A77 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.040
Use #3A517F 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.