#2F396C
Closest named color: Marine Blue (#01386A). oklch(36.3% 0.089 272.9), rgb(47, 57, 108).
Aa
White text reads best on this color (10.92:1).
About this color
#2F396C is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.089 and its hue 273°. 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 10.92:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.92:1 |
| White text | 10.92:1 |
Values
| HEX | #2F396C |
| RGB | rgb(47, 57, 108) |
| HSL | hsl(230, 39%, 30%) |
| OKLCH | oklch(36.3% 0.089 272.9) |
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 #2F396C | 10.92:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #2F396C | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #2F396C text on white | 10.92:1 | AAA | Lc 95.1 | Preferred for body text |
| #2F396C text on black | 1.92:1 | Fails | Lc -7.5 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B2BEEC
oklch(80.8% 0.066 273.4)
-
Step 400
400
#8A9CE3
oklch(70.7% 0.106 272.6)
-
Step 500
500
#6F82DB
oklch(63.2% 0.135 272.9)
-
Step 600
600
#5869C8
oklch(55.5% 0.147 273.1)
-
Step 700
700
#4857AD
oklch(49% 0.137 272.9)
-
Step 800
800
#3B488C
oklch(42.7% 0.113 272.6)
-
Step 900
900 (this color)
#2F396C
oklch(36.3% 0.089 272.9)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#2F396C 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) | #233F6E | 0.021 |
| Deuteranopia (no green cones) | #1C3A6B | 0.023 |
| Tritanopia (no blue cones) | #11444D | 0.078 |
| Achromatopsia (no color) | #3D3D3D | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F396C
#2F396C
oklch(36.3% 0.089 272.9)
- #4B3C00
#4B3C00
oklch(36.2% 0.074 93)
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 #2F396C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.062
- Marine #042E60 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.067
- Charcoal #264653 ΔE 0.068
Use #2F396C 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.