#2F366B
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.091 275.1), rgb(47, 54, 107).
Aa
White text reads best on this color (11.28:1).
About this color
#2F366B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 275°. 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 11.28:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.86:1 |
| White text | 11.28:1 |
Values
| HEX | #2F366B |
| RGB | rgb(47, 54, 107) |
| HSL | hsl(233, 39%, 30%) |
| OKLCH | oklch(35.6% 0.091 275.1) |
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 #2F366B | 11.28:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #2F366B | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #2F366B text on white | 11.28:1 | AAA | Lc 95.9 | Preferred for body text |
| #2F366B text on black | 1.86:1 | 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
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B3BEEE
oklch(80.9% 0.069 274.7)
-
Step 400
400
#8D9BE5
oklch(70.8% 0.109 275.1)
-
Step 500
500
#7280DD
oklch(63.1% 0.14 275.2)
-
Step 600
600
#5B68CB
oklch(55.7% 0.152 274.7)
-
Step 700
700
#4B56AF
oklch(49.1% 0.141 274.7)
-
Step 800
800
#3E468E
oklch(42.6% 0.118 275.5)
-
Step 900
900 (this color)
#2F366B
oklch(35.6% 0.091 275.1)
-
Step 950
950
#1E2342
oklch(26.8% 0.058 274.9)
#2F366B 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) | #1E3D6D | 0.027 |
| Deuteranopia (no green cones) | #17386A | 0.029 |
| Tritanopia (no blue cones) | #13424B | 0.082 |
| Achromatopsia (no color) | #3B3B3B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F366B
#2F366B
oklch(35.6% 0.091 275.1)
- #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 #2F366B, 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 0.044
- Twilight Blue #0A437A ΔE 0.049
- Marine #042E60 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.070
- Charcoal #264653 ΔE 0.073
Use #2F366B 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.