#3A4271
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.08 274.8), rgb(58, 66, 113).
Aa
White text reads best on this color (9.55:1).
About this color
#3A4271 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.080 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.048 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #3A4271 |
| RGB | rgb(58, 66, 113) |
| HSL | hsl(231, 32%, 34%) |
| OKLCH | oklch(39.5% 0.08 274.8) |
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 #3A4271 | 9.55:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #3A4271 | 2.19:1 | Fails | Lc 11.9 | Not readable |
| #3A4271 text on white | 9.55:1 | AAA | Lc 92.0 | Preferred for body text |
| #3A4271 text on black | 2.19:1 | Fails | Lc -10.4 | 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 900.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B5BEE8
oklch(80.9% 0.06 275.5)
-
Step 400
400
#8F9CDD
oklch(70.8% 0.096 275)
-
Step 500
500
#7482D3
oklch(63.1% 0.123 274.9)
-
Step 600
600
#5D6AC0
oklch(55.5% 0.133 274.7)
-
Step 700
700
#4D58A6
oklch(49.1% 0.124 274.8)
-
Step 800
800
#3F4886
oklch(42.6% 0.103 275)
-
Step 900
900 (this color)
#3A4271
oklch(39.5% 0.08 274.8)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#3A4271 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) | #304873 | 0.020 |
| Deuteranopia (no green cones) | #2C4370 | 0.019 |
| Tritanopia (no blue cones) | #264C54 | 0.071 |
| Achromatopsia (no color) | #454545 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4271
#3A4271
oklch(39.5% 0.08 274.8)
- #544502
#544502
oklch(39.5% 0.08 94.6)
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 #3A4271, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.053
- Light Navy #155084 ΔE 0.054
- Cobalt #1E488F ΔE 0.057
- Dusk Blue #26538D ΔE 0.062
- Charcoal #264653 ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.064
Use #3A4271 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.