#2D316B
Closest named color: Marine Blue (#01386A). oklch(34.3% 0.099 276.8), rgb(45, 49, 107).
Aa
White text reads best on this color (11.91:1).
About this color
#2D316B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.099 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.043 away. White text reads best on it, at 11.91:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #2D316B |
| RGB | rgb(45, 49, 107) |
| HSL | hsl(236, 41%, 30%) |
| OKLCH | oklch(34.3% 0.099 276.8) |
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 #2D316B | 11.91:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2D316B | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #2D316B text on white | 11.91:1 | AAA | Lc 97.1 | Preferred for body text |
| #2D316B text on black | 1.76:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B4BDF1
oklch(80.9% 0.074 277)
-
Step 400
400
#8E99EA
oklch(70.7% 0.119 277)
-
Step 500
500
#737EE4
oklch(63.2% 0.152 276.5)
-
Step 600
600
#5D64D2
oklch(55.5% 0.167 276.8)
-
Step 700
700
#4D53B6
oklch(49.2% 0.154 276.5)
-
Step 800
800
#3F4493
oklch(42.7% 0.128 276.8)
-
Step 900
900 (this color)
#2D316B
oklch(34.3% 0.099 276.8)
-
Step 950
950
#1F2345
oklch(27.1% 0.063 276.3)
#2D316B 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) | #123A6D | 0.036 |
| Deuteranopia (no green cones) | #08356A | 0.038 |
| Tritanopia (no blue cones) | #0E3E49 | 0.087 |
| Achromatopsia (no color) | #373737 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D316B
#2D316B
oklch(34.3% 0.099 276.8)
- #433800
#433800
oklch(34.2% 0.071 96.8)
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 #2D316B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.045
- Marine #042E60 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.069
- Midnight Blue #191970 ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.075
Use #2D316B 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.