#2A355D
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.072 270.6), rgb(42, 53, 93).
Aa
White text reads best on this color (11.89:1).
About this color
#2A355D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.072 and its hue 271°. 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 11.89:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.89:1 |
Values
| HEX | #2A355D |
| RGB | rgb(42, 53, 93) |
| HSL | hsl(227, 38%, 26%) |
| OKLCH | oklch(34% 0.072 270.6) |
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 #2A355D | 11.89:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2A355D | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #2A355D text on white | 11.89:1 | AAA | Lc 97.2 | Preferred for body text |
| #2A355D 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B3C0E4
oklch(81% 0.053 269.6)
-
Step 400
400
#8C9ED7
oklch(70.7% 0.086 270.6)
-
Step 500
500
#7085CC
oklch(63% 0.11 270.5)
-
Step 600
600
#596EB9
oklch(55.6% 0.119 270.4)
-
Step 700
700
#495BA0
oklch(49% 0.113 270.8)
-
Step 800
800
#3C4B81
oklch(42.7% 0.092 270.4)
-
Step 900
900 (this color)
#2A355D
oklch(34% 0.072 270.6)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#2A355D 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) | #25395F | 0.013 |
| Deuteranopia (no green cones) | #20355C | 0.014 |
| Tritanopia (no blue cones) | #143E44 | 0.065 |
| Achromatopsia (no color) | #373737 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A355D
#2A355D
oklch(34% 0.072 270.6)
- #463600
#463600
oklch(34.1% 0.07 90.3)
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 #2A355D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine Blue #01386A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.041
- Marine #042E60 ΔE 0.048
- Gunmetal #293241 ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.050
- Midnight Green #073B4C ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.055
Use #2A355D 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.