#3D5181
Closest named color: Dusk (#4E5481). oklch(44.1% 0.083 265.9), rgb(61, 81, 129).
Aa
White text reads best on this color (7.79:1).
About this color
#3D5181 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.083 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.027 away. White text reads best on it, at 7.79:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.69:1 |
| White text | 7.79:1 |
Values
| HEX | #3D5181 |
| RGB | rgb(61, 81, 129) |
| HSL | hsl(222, 36%, 37%) |
| OKLCH | oklch(44.1% 0.083 265.9) |
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 #3D5181 | 7.79:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #3D5181 | 2.69:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #3D5181 text on white | 7.79:1 | AAA | Lc 87.0 | Fine for body text |
| #3D5181 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D1D9EC
oklch(88.5% 0.028 267.5)
-
Step 300
300
#B2C1E1
oklch(81% 0.048 265.4)
-
Step 400
400
#8AA0D2
oklch(70.7% 0.078 266)
-
Step 500
500
#6D88C6
oklch(63.2% 0.099 265.7)
-
Step 600
600
#5571B3
oklch(55.7% 0.108 265.6)
-
Step 700
700
#465E9A
oklch(49.1% 0.101 266.3)
-
Step 800
800 (this color)
#3D5181
oklch(44.1% 0.083 265.9)
-
Step 900
900
#314064
oklch(37.6% 0.065 266.1)
-
Step 950
950
#1D263B
oklch(27.1% 0.041 266)
#3D5181 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) | #3E5583 | 0.012 |
| Deuteranopia (no green cones) | #374F80 | 0.010 |
| Tritanopia (no blue cones) | #1E5B63 | 0.074 |
| Achromatopsia (no color) | #525252 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D5181
#3D5181
oklch(44.1% 0.083 265.9)
- #674F0F
#674F0F
oklch(44.1% 0.083 86.4)
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 #3D5181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusk Blue #26538D ΔE 0.030
- Twilight #4E518B ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.036
- Light Navy #155084 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.044
Use #3D5181 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.