#2B3554
Closest named color: Prussian Blue (#1D3557). oklch(33.5% 0.057 269.6), rgb(43, 53, 84).
Aa
White text reads best on this color (12.06:1).
About this color
#2B3554 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.057 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.06:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.06:1 |
Values
| HEX | #2B3554 |
| RGB | rgb(43, 53, 84) |
| HSL | hsl(225, 32%, 25%) |
| OKLCH | oklch(33.5% 0.057 269.6) |
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 #2B3554 | 12.06:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #2B3554 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #2B3554 text on white | 12.06:1 | AAA | Lc 97.5 | Preferred for body text |
| #2B3554 text on black | 1.73:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D3D9E9
oklch(88.6% 0.023 269.4)
-
Step 300
300
#B5C0DD
oklch(80.9% 0.043 269)
-
Step 400
400
#909FCC
oklch(70.7% 0.068 270.3)
-
Step 500
500
#7487BF
oklch(63.1% 0.088 269.4)
-
Step 600
600
#5D70AB
oklch(55.6% 0.095 269.6)
-
Step 700
700
#4D5E93
oklch(49.2% 0.088 269.5)
-
Step 800
800
#3F4D77
oklch(42.8% 0.072 269.2)
-
Step 900
900 (this color)
#2B3554
oklch(33.5% 0.057 269.6)
-
Step 950
950
#1F2638
oklch(27.1% 0.035 267.7)
#2B3554 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) | #2A3855 | 0.009 |
| Deuteranopia (no green cones) | #263453 | 0.008 |
| Tritanopia (no blue cones) | #1C3B40 | 0.050 |
| Achromatopsia (no color) | #363636 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3554
#2B3554
oklch(33.5% 0.057 269.6)
- #42350F
#42350F
oklch(33.5% 0.057 89.8)
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 #2B3554, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.030
- Gunmetal #293241 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.036
- Midnight Green #073B4C ΔE 0.043
- Onyx #343A40 ΔE 0.046
- Marine Blue #01386A ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.053
Use #2B3554 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.