#2F375F
Closest named color: Prussian Blue (#1D3557). oklch(35% 0.07 273.7), rgb(47, 55, 95).
Aa
White text reads best on this color (11.45:1).
About this color
#2F375F is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.070 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 11.45:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.83:1 |
| White text | 11.45:1 |
Values
| HEX | #2F375F |
| RGB | rgb(47, 55, 95) |
| HSL | hsl(230, 34%, 28%) |
| OKLCH | oklch(35% 0.07 273.7) |
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 #2F375F | 11.45:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #2F375F | 1.83:1 | Fails | Lc 7.6 | Not readable |
| #2F375F text on white | 11.45:1 | AAA | Lc 96.3 | Preferred for body text |
| #2F375F text on black | 1.83:1 | 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
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B5BFE4
oklch(80.9% 0.053 273.3)
-
Step 400
400
#909DD6
oklch(70.7% 0.085 274.1)
-
Step 500
500
#7584CB
oklch(63.1% 0.108 273.8)
-
Step 600
600
#5E6DB8
oklch(55.7% 0.118 273.5)
-
Step 700
700
#4E5A9E
oklch(49% 0.109 274.1)
-
Step 800
800
#404A80
oklch(42.7% 0.09 274)
-
Step 900
900 (this color)
#2F375F
oklch(35% 0.07 273.7)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#2F375F 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) | #283C61 | 0.017 |
| Deuteranopia (no green cones) | #24385E | 0.015 |
| Tritanopia (no blue cones) | #1D3F46 | 0.062 |
| Achromatopsia (no color) | #3A3A3A | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F375F
#2F375F
oklch(35% 0.07 273.7)
- #473902
#473902
oklch(35% 0.07 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 #2F375F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.044
- Marine Blue #01386A ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.050
- Gunmetal #293241 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.056
- Midnight Green #073B4C ΔE 0.057
- Marine #042E60 ΔE 0.058
Use #2F375F 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.