#2D3374
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.11 275.3), rgb(45, 51, 116).
Aa
White text reads best on this color (11.42:1).
About this color
#2D3374 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.110 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.046 away. White text reads best on it, at 11.42:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.83:1 |
| White text | 11.42:1 |
Values
| HEX | #2D3374 |
| RGB | rgb(45, 51, 116) |
| HSL | hsl(235, 44%, 32%) |
| OKLCH | oklch(35.5% 0.11 275.3) |
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 #2D3374 | 11.42:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #2D3374 | 1.83:1 | Fails | Lc 7.8 | Not readable |
| #2D3374 text on white | 11.42:1 | AAA | Lc 96.1 | Preferred for body text |
| #2D3374 text on black | 1.83:1 | 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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D7F8
oklch(88.4% 0.046 276)
-
Step 300
300
#B1BDF7
oklch(81% 0.083 275.3)
-
Step 400
400
#8998F2
oklch(70.6% 0.133 275.3)
-
Step 500
500
#6E7CEE
oklch(63.1% 0.17 275.2)
-
Step 600
600
#5862DC
oklch(55.5% 0.184 275.1)
-
Step 700
700
#4950BF
oklch(49% 0.171 275.4)
-
Step 800
800
#3C439B
oklch(42.9% 0.142 275.3)
-
Step 900
900 (this color)
#2D3374
oklch(35.5% 0.11 275.3)
-
Step 950
950
#1D2248
oklch(27% 0.07 275)
#2D3374 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) | #0A3D76 | 0.039 |
| Deuteranopia (no green cones) | #003773 | 0.040 |
| Tritanopia (no blue cones) | #00424E | 0.097 |
| Achromatopsia (no color) | #3A3A3A | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3374
#2D3374
oklch(35.5% 0.11 275.3)
- #483B00
#483B00
oklch(35.6% 0.073 95)
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 #2D3374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.046
- Twilight Blue #0A437A ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.057
- Marine #042E60 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Cobalt #1E488F ΔE 0.069
- Midnight Blue #191970 ΔE 0.075
- Dark Grey Blue #29465B ΔE 0.079
Use #2D3374 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.