#2B306B
Closest named color: Marine Blue (#01386A). oklch(34% 0.101 275.9), rgb(43, 48, 107).
Aa
White text reads best on this color (12.08:1).
About this color
#2B306B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.101 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.042 away. White text reads best on it, at 12.08:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.73:1 |
| White text | 12.08:1 |
Values
| HEX | #2B306B |
| RGB | rgb(43, 48, 107) |
| HSL | hsl(235, 43%, 29%) |
| OKLCH | oklch(34% 0.101 275.9) |
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 #2B306B | 12.08:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #2B306B | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #2B306B text on white | 12.08:1 | AAA | Lc 97.4 | Preferred for body text |
| #2B306B text on black | 1.73:1 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B3BDF2
oklch(80.9% 0.076 276.3)
-
Step 400
400
#8C99EC
oklch(70.7% 0.122 276)
-
Step 500
500
#717EE6
oklch(63.2% 0.155 275.7)
-
Step 600
600
#5B64D4
oklch(55.5% 0.17 275.9)
-
Step 700
700
#4B53B8
oklch(49.2% 0.157 275.6)
-
Step 800
800
#3E4494
oklch(42.7% 0.13 276.2)
-
Step 900
900 (this color)
#2B306B
oklch(34% 0.101 275.9)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#2B306B 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) | #0F396D | 0.036 |
| Deuteranopia (no green cones) | #03336A | 0.039 |
| Tritanopia (no blue cones) | #063D48 | 0.089 |
| Achromatopsia (no color) | #363636 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B306B
#2B306B
oklch(34% 0.101 275.9)
- #433700
#433700
oklch(34% 0.07 95.4)
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 #2B306B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.045
- Marine #042E60 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.059
- Midnight Blue #191970 ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.072
- Gunmetal #293241 ΔE 0.077
Use #2B306B 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.