#2A3455
Closest named color: Prussian Blue (#1D3557). oklch(33.2% 0.06 270.1), rgb(42, 52, 85).
Aa
White text reads best on this color (12.20:1).
About this color
#2A3455 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.060 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 12.20:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.72:1 |
| White text | 12.20:1 |
Values
| HEX | #2A3455 |
| RGB | rgb(42, 52, 85) |
| HSL | hsl(226, 34%, 25%) |
| OKLCH | oklch(33.2% 0.06 270.1) |
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 #2A3455 | 12.20:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #2A3455 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #2A3455 text on white | 12.20:1 | AAA | Lc 97.8 | Preferred for body text |
| #2A3455 text on black | 1.72:1 | 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
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B5C0DF
oklch(80.9% 0.045 269.9)
-
Step 400
400
#8F9FCE
oklch(70.7% 0.071 269.9)
-
Step 500
500
#7487C2
oklch(63.2% 0.092 270)
-
Step 600
600
#5D70AE
oklch(55.7% 0.099 270)
-
Step 700
700
#4C5D96
oklch(49.1% 0.094 270.1)
-
Step 800
800
#3F4C79
oklch(42.7% 0.077 270.7)
-
Step 900
900 (this color)
#2A3455
oklch(33.2% 0.06 270.1)
-
Step 950
950
#1F2539
oklch(26.9% 0.038 270.9)
#2A3455 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) | #283756 | 0.009 |
| Deuteranopia (no green cones) | #243454 | 0.009 |
| Tritanopia (no blue cones) | #1A3B40 | 0.054 |
| Achromatopsia (no color) | #353535 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3455
#2A3455
oklch(33.2% 0.06 270.1)
- #42340A
#42340A
oklch(33.2% 0.06 89.6)
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 #2A3455, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.032
- Gunmetal #293241 ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.036
- Midnight Green #073B4C ΔE 0.045
- Marine Blue #01386A ΔE 0.048
- Onyx #343A40 ΔE 0.050
- Marine #042E60 ΔE 0.050
Use #2A3455 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.