#182A5F
Closest named color: Marine (#042E60). oklch(30.4% 0.097 266.5), rgb(24, 42, 95).
Aa
White text reads best on this color (13.67:1).
About this color
#182A5F is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.097 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.018 away. White text reads best on it, at 13.67:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.53:1 |
| White text | 13.67:1 |
Values
| HEX | #182A5F |
| RGB | rgb(24, 42, 95) |
| HSL | hsl(225, 60%, 23%) |
| OKLCH | oklch(30.4% 0.097 266.5) |
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 #182A5F | 13.67:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #182A5F | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #182A5F text on white | 13.67:1 | AAA | Lc 99.9 | Preferred for body text |
| #182A5F text on black | 1.53:1 | 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 950.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFF
oklch(70.8% 0.151 266.4)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#325DFF
oklch(55.6% 0.244 266.4)
-
Step 700
700
#2447E5
oklch(49.1% 0.239 266.4)
-
Step 800
800
#1E3CB8
oklch(42.6% 0.197 266.5)
-
Step 900
900
#1C3691
oklch(37.6% 0.153 266.5)
-
Step 950
950 (this color)
#182A5F
oklch(30.4% 0.097 266.5)
#182A5F 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) | #083161 | 0.022 |
| Deuteranopia (no green cones) | #002A5E | 0.021 |
| Tritanopia (no blue cones) | #003740 | 0.079 |
| Achromatopsia (no color) | #2D2D2D | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182A5F
#182A5F
oklch(30.4% 0.097 266.5)
- #3C2C00
#3C2C00
oklch(30.3% 0.062 87)
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 #182A5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.018
- Prussian Blue #1D3557 ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Midnight Blue #191970 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.065
- Gunmetal #293241 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.070
Use #182A5F 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.