#2F3758
Closest named color: Prussian Blue (#1D3557). oklch(34.6% 0.059 272.6), rgb(47, 55, 88).
Aa
White text reads best on this color (11.61:1).
About this color
#2F3758 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.059 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 11.61:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.80:1 |
| White text | 11.61:1 |
Values
| HEX | #2F3758 |
| RGB | rgb(47, 55, 88) |
| HSL | hsl(228, 30%, 26%) |
| OKLCH | oklch(34.6% 0.059 272.6) |
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 #2F3758 | 11.61:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #2F3758 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #2F3758 text on white | 11.61:1 | AAA | Lc 96.7 | Preferred for body text |
| #2F3758 text on black | 1.80:1 | 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
#D3D8EA
oklch(88.4% 0.025 273.5)
-
Step 300
300
#B7BFDE
oklch(80.8% 0.045 273.9)
-
Step 400
400
#919ECD
oklch(70.6% 0.071 272.5)
-
Step 500
500
#7786C0
oklch(63.1% 0.089 272.5)
-
Step 600
600
#606FAD
oklch(55.7% 0.098 272.5)
-
Step 700
700
#4F5C94
oklch(49% 0.091 272.7)
-
Step 800
800
#414C78
oklch(42.7% 0.075 272.2)
-
Step 900
900 (this color)
#2F3758
oklch(34.6% 0.059 272.6)
-
Step 950
950
#202539
oklch(26.9% 0.038 272.9)
#2F3758 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) | #2B3A59 | 0.010 |
| Deuteranopia (no green cones) | #283757 | 0.010 |
| Tritanopia (no blue cones) | #213E43 | 0.053 |
| Achromatopsia (no color) | #393939 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3758
#2F3758
oklch(34.6% 0.059 272.6)
- #443810
#443810
oklch(34.5% 0.059 92.2)
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 #2F3758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.034
- Gunmetal #293241 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Onyx #343A40 ΔE 0.047
- Midnight Green #073B4C ΔE 0.049
- Marine Blue #01386A ΔE 0.051
Use #2F3758 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.