#2B2571
Closest named color: Midnight Blue (#191970). oklch(32.3% 0.126 280.2), rgb(43, 37, 113).
Aa
White text reads best on this color (13.07:1).
About this color
#2B2571 is a dark, moderately saturated purple. In OKLCH its lightness is 32%, its chroma 0.126 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.043 away. White text reads best on it, at 13.07:1.
| Hue family | Purples |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.60:1 |
| White text | 13.07:1 |
Values
| HEX | #2B2571 |
| RGB | rgb(43, 37, 113) |
| HSL | hsl(245, 51%, 29%) |
| OKLCH | oklch(32.3% 0.126 280.2) |
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 #2B2571 | 13.07:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #2B2571 | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #2B2571 text on white | 13.07:1 | AAA | Lc 98.9 | Preferred for body text |
| #2B2571 text on black | 1.60:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D1D6FF
oklch(88.5% 0.057 279.7)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#8F93FF
oklch(70.7% 0.156 280)
-
Step 500
500
#7773FF
oklch(63.2% 0.202 280.2)
-
Step 600
600
#634CFF
oklch(55.7% 0.251 280.3)
-
Step 700
700
#5604FF
oklch(49.1% 0.295 280.2)
-
Step 800
800
#4605D3
oklch(42.7% 0.255 280.3)
-
Step 900
900
#381DA6
oklch(37.8% 0.199 280)
-
Step 950
950 (this color)
#2B2571
oklch(32.3% 0.126 280.2)
#2B2571 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) | #003373 | 0.050 |
| Deuteranopia (no green cones) | #002E70 | 0.046 |
| Tritanopia (no blue cones) | #003847 | 0.107 |
| Achromatopsia (no color) | #313131 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B2571
#2B2571
oklch(32.3% 0.126 280.2)
- #3C3400
#3C3400
oklch(32.4% 0.067 99.8)
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 #2B2571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.043
- Marine #042E60 ΔE 0.056
- Marine Blue #01386A ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.069
- Royal #0C1793 ΔE 0.076
- Indigo #4B0082 ΔE 0.079
- Royal Purple #4B006E ΔE 0.081
- Twilight Blue #0A437A ΔE 0.082
Use #2B2571 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.