#182E4B
Closest named color: Prussian Blue (#1D3557). oklch(29.9% 0.06 255.9), rgb(24, 46, 75).
Aa
White text reads best on this color (13.71:1).
About this color
#182E4B is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.060 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 13.71:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.53:1 |
| White text | 13.71:1 |
Values
| HEX | #182E4B |
| RGB | rgb(24, 46, 75) |
| HSL | hsl(214, 52%, 19%) |
| OKLCH | oklch(29.9% 0.06 255.9) |
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 #182E4B | 13.71:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #182E4B | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #182E4B text on white | 13.71:1 | AAA | Lc 100.1 | Preferred for body text |
| #182E4B 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
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A3C3EF
oklch(80.9% 0.072 256.4)
-
Step 400
400
#70A3E7
oklch(70.8% 0.114 255.9)
-
Step 500
500
#498ADF
oklch(63.1% 0.145 256)
-
Step 600
600
#2972CD
oklch(55.6% 0.158 256)
-
Step 700
700
#1B5FB1
oklch(49% 0.146 255.9)
-
Step 800
800
#194E90
oklch(42.7% 0.122 256.1)
-
Step 900
900
#1B4273
oklch(37.8% 0.095 255.6)
-
Step 950
950 (this color)
#182E4B
oklch(29.9% 0.06 255.9)
#182E4B 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) | #22304C | 0.015 |
| Deuteranopia (no green cones) | #1B2B4A | 0.010 |
| Tritanopia (no blue cones) | #003539 | 0.050 |
| Achromatopsia (no color) | #2D2D2D | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182E4B
#182E4B
oklch(29.9% 0.06 255.9)
- #3E2903
#3E2903
oklch(29.9% 0.06 77.2)
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 #182E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.030
- Gunmetal #293241 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.035
- Marine #042E60 ΔE 0.040
- Midnight Green #073B4C ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.045
- Dark #1B2431 ΔE 0.052
Use #182E4B 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.