#2B396D
Closest named color: Marine Blue (#01386A). oklch(36.1% 0.091 270), rgb(43, 57, 109).
Aa
White text reads best on this color (11.00:1).
About this color
#2B396D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.038 away. White text reads best on it, at 11.00:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 11.00:1 |
Values
| HEX | #2B396D |
| RGB | rgb(43, 57, 109) |
| HSL | hsl(227, 43%, 30%) |
| OKLCH | oklch(36.1% 0.091 270) |
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 #2B396D | 11.00:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #2B396D | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #2B396D text on white | 11.00:1 | AAA | Lc 95.3 | Preferred for body text |
| #2B396D text on black | 1.90:1 | Fails | Lc -7.4 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFEE
oklch(80.9% 0.069 270.1)
-
Step 400
400
#869DE5
oklch(70.7% 0.109 269.9)
-
Step 500
500
#6983DE
oklch(63.2% 0.14 270)
-
Step 600
600
#516ACB
oklch(55.5% 0.152 270)
-
Step 700
700
#4258B0
oklch(49% 0.142 269.9)
-
Step 800
800
#37498F
oklch(42.9% 0.117 270)
-
Step 900
900 (this color)
#2B396D
oklch(36.1% 0.091 270)
-
Step 950
950
#1B2443
oklch(26.9% 0.059 269.9)
#2B396D 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) | #213F6F | 0.019 |
| Deuteranopia (no green cones) | #18396C | 0.022 |
| Tritanopia (no blue cones) | #00454D | 0.083 |
| Achromatopsia (no color) | #3C3C3C | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B396D
#2B396D
oklch(36.1% 0.091 270)
- #4C3B00
#4C3B00
oklch(36.1% 0.074 90.5)
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 #2B396D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.038
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.057
- Marine #042E60 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.061
- Cobalt #1E488F ΔE 0.066
- Charcoal #264653 ΔE 0.069
Use #2B396D 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.