#2B3553
Closest named color: Prussian Blue (#1D3557). oklch(33.5% 0.055 269.3), rgb(43, 53, 83).
Aa
White text reads best on this color (12.09:1).
About this color
#2B3553 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.055 and its hue 269°. 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 12.09:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.09:1 |
Values
| HEX | #2B3553 |
| RGB | rgb(43, 53, 83) |
| HSL | hsl(225, 32%, 25%) |
| OKLCH | oklch(33.5% 0.055 269.3) |
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 #2B3553 | 12.09:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #2B3553 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #2B3553 text on white | 12.09:1 | AAA | Lc 97.6 | Preferred for body text |
| #2B3553 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
#B6C0DC
oklch(80.9% 0.041 269.9)
-
Step 400
400
#909FCB
oklch(70.7% 0.067 270)
-
Step 500
500
#7587BD
oklch(63.1% 0.084 269.7)
-
Step 600
600
#5E70A9
oklch(55.5% 0.092 269.9)
-
Step 700
700
#4D5E91
oklch(49.1% 0.085 269.1)
-
Step 800
800
#3F4D76
oklch(42.7% 0.071 268.9)
-
Step 900
900 (this color)
#2B3553
oklch(33.5% 0.055 269.3)
-
Step 950
950
#1F2638
oklch(27.1% 0.035 267.7)
#2B3553 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) | #2A3854 | 0.009 |
| Deuteranopia (no green cones) | #263452 | 0.009 |
| Tritanopia (no blue cones) | #1D3B40 | 0.048 |
| Achromatopsia (no color) | #363636 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3553
#2B3553
oklch(33.5% 0.055 269.3)
- #423511
#423511
oklch(33.5% 0.055 89.1)
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 #2B3553, 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 0.028
- Gunmetal #293241 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.035
- Midnight Green #073B4C ΔE 0.043
- Onyx #343A40 ΔE 0.044
- Marine Blue #01386A ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
Use #2B3553 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.