#182E4C
Closest named color: Prussian Blue (#1D3557). oklch(29.9% 0.062 256.6), rgb(24, 46, 76).
Aa
White text reads best on this color (13.68:1).
About this color
#182E4C is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.062 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 13.68:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.53:1 |
| White text | 13.68:1 |
Values
| HEX | #182E4C |
| RGB | rgb(24, 46, 76) |
| HSL | hsl(215, 52%, 20%) |
| OKLCH | oklch(29.9% 0.062 256.6) |
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 #182E4C | 13.68:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #182E4C | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #182E4C text on white | 13.68:1 | AAA | Lc 100.1 | Preferred for body text |
| #182E4C 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A3C3F0
oklch(80.9% 0.073 256.9)
-
Step 400
400
#70A3E8
oklch(70.8% 0.115 256.2)
-
Step 500
500
#488AE2
oklch(63.2% 0.149 256.4)
-
Step 600
600
#2871D0
oklch(55.5% 0.163 256.8)
-
Step 700
700
#1A5EB4
oklch(49% 0.152 256.8)
-
Step 800
800
#194E91
oklch(42.8% 0.124 256.3)
-
Step 900
900
#1B4174
oklch(37.7% 0.098 256.7)
-
Step 950
950 (this color)
#182E4C
oklch(29.9% 0.062 256.6)
#182E4C 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) | #21304D | 0.014 |
| Deuteranopia (no green cones) | #1A2B4B | 0.010 |
| Tritanopia (no blue cones) | #003539 | 0.052 |
| Achromatopsia (no color) | #2D2D2D | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182E4C
#182E4C
oklch(29.9% 0.062 256.6)
- #3F2901
#3F2901
oklch(30% 0.062 77)
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 #182E4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.031
- Gunmetal #293241 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.036
- Marine #042E60 ΔE 0.038
- Midnight Green #073B4C ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.045
- Dark #1B2431 ΔE 0.054
Use #182E4C 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.