#2F3156
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.065 279.9), rgb(47, 49, 86).
Aa
White text reads best on this color (12.39:1).
About this color
#2F3156 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.065 and its hue 280°. 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 12.39:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.39:1 |
Values
| HEX | #2F3156 |
| RGB | rgb(47, 49, 86) |
| HSL | hsl(237, 29%, 26%) |
| OKLCH | oklch(33% 0.065 279.9) |
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 #2F3156 | 12.39:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #2F3156 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #2F3156 text on white | 12.39:1 | AAA | Lc 98.1 | Preferred for body text |
| #2F3156 text on black | 1.69:1 | 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
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#BABEE0
oklch(80.9% 0.048 280)
-
Step 400
400
#969CD1
oklch(70.7% 0.078 279.2)
-
Step 500
500
#7D82C5
oklch(63% 0.101 279.8)
-
Step 600
600
#676BB1
oklch(55.6% 0.108 279.8)
-
Step 700
700
#565998
oklch(49.1% 0.1 280)
-
Step 800
800
#46497C
oklch(42.7% 0.084 279.6)
-
Step 900
900 (this color)
#2F3156
oklch(33% 0.065 279.9)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#2F3156 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) | #243657 | 0.021 |
| Deuteranopia (no green cones) | #223355 | 0.020 |
| Tritanopia (no blue cones) | #23383F | 0.056 |
| Achromatopsia (no color) | #343434 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3156
#2F3156
oklch(33% 0.065 279.9)
- #3D3605
#3D3605
oklch(33% 0.065 100.7)
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 #2F3156, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.037
- Gunmetal #293241 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.044
- Marine #042E60 ΔE 0.053
- Marine Blue #01386A ΔE 0.054
- Onyx #343A40 ΔE 0.056
- Midnight Green #073B4C ΔE 0.056
Use #2F3156 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.