#2F375B
Closest named color: Prussian Blue (#1D3557). oklch(34.7% 0.064 273.2), rgb(47, 55, 91).
Aa
White text reads best on this color (11.54:1).
About this color
#2F375B is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.064 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.54:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.54:1 |
Values
| HEX | #2F375B |
| RGB | rgb(47, 55, 91) |
| HSL | hsl(229, 32%, 27%) |
| OKLCH | oklch(34.7% 0.064 273.2) |
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 #2F375B | 11.54:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #2F375B | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #2F375B text on white | 11.54:1 | AAA | Lc 96.5 | Preferred for body text |
| #2F375B text on black | 1.81:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B6BFE0
oklch(80.8% 0.048 273.3)
-
Step 400
400
#919ED1
oklch(70.8% 0.076 273.2)
-
Step 500
500
#7685C5
oklch(63.1% 0.098 273.2)
-
Step 600
600
#5F6EB1
oklch(55.6% 0.106 273)
-
Step 700
700
#4F5C99
oklch(49.2% 0.099 273.2)
-
Step 800
800
#404B7C
oklch(42.7% 0.083 272.9)
-
Step 900
900 (this color)
#2F375B
oklch(34.7% 0.064 273.2)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#2F375B 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) | #2A3B5C | 0.013 |
| Deuteranopia (no green cones) | #26375A | 0.013 |
| Tritanopia (no blue cones) | #1F3E44 | 0.057 |
| Achromatopsia (no color) | #393939 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F375B
#2F375B
oklch(34.7% 0.064 273.2)
- #45390A
#45390A
oklch(34.8% 0.064 94)
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 #2F375B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.048
- Gunmetal #293241 ΔE 0.048
- Marine Blue #01386A ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.050
- Onyx #343A40 ΔE 0.052
- Midnight Green #073B4C ΔE 0.053
Use #2F375B 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.