#2B3153
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.061 274.9), rgb(43, 49, 83).
Aa
White text reads best on this color (12.59:1).
About this color
#2B3153 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.061 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.59:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #2B3153 |
| RGB | rgb(43, 49, 83) |
| HSL | hsl(231, 32%, 25%) |
| OKLCH | oklch(32.5% 0.061 274.9) |
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 #2B3153 | 12.59:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #2B3153 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #2B3153 text on white | 12.59:1 | AAA | Lc 98.5 | Preferred for body text |
| #2B3153 text on black | 1.66:1 | 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
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B7BFDF
oklch(80.9% 0.046 274.3)
-
Step 400
400
#939DCF
oklch(70.6% 0.074 275.6)
-
Step 500
500
#7985C2
oklch(63.2% 0.093 274.9)
-
Step 600
600
#626EAE
oklch(55.6% 0.1 274.6)
-
Step 700
700
#515B96
oklch(49% 0.095 275)
-
Step 800
800
#434B7A
oklch(42.8% 0.079 275.2)
-
Step 900
900 (this color)
#2B3153
oklch(32.5% 0.061 274.9)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#2B3153 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) | #253554 | 0.014 |
| Deuteranopia (no green cones) | #213252 | 0.015 |
| Tritanopia (no blue cones) | #1D383E | 0.054 |
| Achromatopsia (no color) | #333333 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3153
#2B3153
oklch(32.5% 0.061 274.9)
- #3E3307
#3E3307
oklch(32.4% 0.061 94.2)
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 #2B3153, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Space Cadet #2B2D42 ΔE 0.031
- Gunmetal #293241 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.039
- Marine #042E60 ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
- Marine Blue #01386A ΔE 0.053
- Onyx #343A40 ΔE 0.053
Use #2B3153 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.