#3A4571
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.076 272), rgb(58, 69, 113).
Aa
White text reads best on this color (9.25:1).
About this color
#3A4571 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.076 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.046 away. White text reads best on it, at 9.25:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #3A4571 |
| RGB | rgb(58, 69, 113) |
| HSL | hsl(228, 32%, 34%) |
| OKLCH | oklch(40.2% 0.076 272) |
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 #3A4571 | 9.25:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #3A4571 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #3A4571 text on white | 9.25:1 | AAA | Lc 91.3 | Preferred for body text |
| #3A4571 text on black | 2.26:1 | Fails | Lc -11.1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7EAF3
oklch(93.7% 0.013 271.3)
-
Step 200
200
#D3D9EA
oklch(88.6% 0.024 270.3)
-
Step 300
300
#B6C0DE
oklch(81% 0.044 270.8)
-
Step 400
400
#919ECD
oklch(70.6% 0.071 272.5)
-
Step 500
500
#7686C1
oklch(63.1% 0.091 272)
-
Step 600
600
#5F6FAD
oklch(55.6% 0.098 271.9)
-
Step 700
700
#4F5D95
oklch(49.2% 0.091 272)
-
Step 800
800 (this color)
#3A4571
oklch(40.2% 0.076 272)
-
Step 900
900
#373F61
oklch(37.6% 0.059 273.1)
-
Step 950
950
#202539
oklch(26.9% 0.038 272.9)
#3A4571 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) | #354A73 | 0.015 |
| Deuteranopia (no green cones) | #304570 | 0.014 |
| Tritanopia (no blue cones) | #264E55 | 0.068 |
| Achromatopsia (no color) | #474747 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4571
#3A4571
oklch(40.2% 0.076 272)
- #57460C
#57460C
oklch(40.1% 0.076 91.3)
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 #3A4571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.046
- Light Navy #155084 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.056
- Cobalt #1E488F ΔE 0.056
- Dusk Blue #26538D ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.058
- Dusk #4E5481 ΔE 0.059
Use #3A4571 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.