#182B53
Closest named color: Marine (#042E60). oklch(29.7% 0.077 263.3), rgb(24, 43, 83).
Aa
White text reads best on this color (13.91:1).
About this color
#182B53 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.077 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.027 away. White text reads best on it, at 13.91:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.50:1 |
| White text | 13.91:1 |
Values
| HEX | #182B53 |
| RGB | rgb(24, 43, 83) |
| HSL | hsl(221, 55%, 21%) |
| OKLCH | oklch(29.7% 0.077 263.3) |
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 #182B53 | 13.91:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #182B53 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #182B53 text on white | 13.91:1 | AAA | Lc 100.4 | Preferred for body text |
| #182B53 text on black | 1.50:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFC
oklch(88.6% 0.051 263.2)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFB
oklch(70.7% 0.146 263.2)
-
Step 500
500
#4B82F8
oklch(63% 0.186 263.3)
-
Step 600
600
#3068E7
oklch(55.6% 0.202 263.4)
-
Step 700
700
#2355C9
oklch(49% 0.189 263.4)
-
Step 800
800
#1E47A3
oklch(42.8% 0.156 263.2)
-
Step 900
900
#1E3D81
oklch(37.8% 0.121 263.3)
-
Step 950
950 (this color)
#182B53
oklch(29.7% 0.077 263.3)
#182B53 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) | #182F55 | 0.013 |
| Deuteranopia (no green cones) | #0E2A52 | 0.012 |
| Tritanopia (no blue cones) | #00343B | 0.063 |
| Achromatopsia (no color) | #2C2C2C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182B53
#182B53
oklch(29.7% 0.077 263.3)
- #3B2A00
#3B2A00
oklch(29.7% 0.061 84.8)
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 #182B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.044
- Gunmetal #293241 ΔE 0.051
- Marine Blue #01386A ΔE 0.052
- Midnight Green #073B4C ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.058
Use #182B53 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.