#2F345B
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.068 276.6), rgb(47, 52, 91).
Aa
White text reads best on this color (11.91:1).
About this color
#2F345B is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.068 and its hue 277°. 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 11.91:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #2F345B |
| RGB | rgb(47, 52, 91) |
| HSL | hsl(233, 32%, 27%) |
| OKLCH | oklch(34% 0.068 276.6) |
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 #2F345B | 11.91:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #2F345B | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #2F345B text on white | 11.91:1 | AAA | Lc 97.2 | Preferred for body text |
| #2F345B text on black | 1.76:1 | 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
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B7BEE2
oklch(80.8% 0.051 276.5)
-
Step 400
400
#939CD4
oklch(70.6% 0.083 277)
-
Step 500
500
#7983C9
oklch(63.1% 0.106 276.7)
-
Step 600
600
#626CB5
oklch(55.6% 0.113 276.2)
-
Step 700
700
#525A9C
oklch(49.2% 0.105 276.6)
-
Step 800
800
#43497E
oklch(42.6% 0.088 277.1)
-
Step 900
900 (this color)
#2F345B
oklch(34% 0.068 276.6)
-
Step 950
950
#21243C
oklch(27% 0.045 277.5)
#2F345B 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) | #26395D | 0.018 |
| Deuteranopia (no green cones) | #22355A | 0.019 |
| Tritanopia (no blue cones) | #203C43 | 0.060 |
| Achromatopsia (no color) | #373737 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F345B
#2F345B
oklch(34% 0.068 276.6)
- #423802
#423802
oklch(34.1% 0.069 97.7)
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 #2F345B, 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 0.043
- Space Cadet #2B2D42 ΔE 0.047
- Gunmetal #293241 ΔE 0.048
- Marine Blue #01386A ΔE 0.048
- Marine #042E60 ΔE 0.054
- Midnight Green #073B4C ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
Use #2F345B 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.