#181D32
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.041 272.7), rgb(24, 29, 50).
Aa
White text reads best on this color (16.65:1).
About this color
#181D32 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.041 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 16.65:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.65:1 |
Values
| HEX | #181D32 |
| RGB | rgb(24, 29, 50) |
| HSL | hsl(228, 35%, 15%) |
| OKLCH | oklch(23.7% 0.041 272.7) |
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 #181D32 | 16.65:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #181D32 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #181D32 text on white | 16.65:1 | AAA | Lc 103.6 | Preferred for body text |
| #181D32 text on black | 1.26:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B6BFE1
oklch(80.9% 0.049 273.6)
-
Step 400
400
#909ED2
oklch(70.7% 0.078 272.6)
-
Step 500
500
#7585C6
oklch(63.1% 0.1 272.7)
-
Step 600
600
#5E6EB2
oklch(55.6% 0.107 272.5)
-
Step 700
700
#4E5C9A
oklch(49.2% 0.101 272.6)
-
Step 800
800
#404B7C
oklch(42.7% 0.083 272.9)
-
Step 900
900
#363F64
oklch(37.7% 0.065 272.6)
-
Step 950
950 (this color)
#181D32
oklch(23.7% 0.041 272.7)
#181D32 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) | #161F33 | 0.007 |
| Deuteranopia (no green cones) | #131D32 | 0.008 |
| Tritanopia (no blue cones) | #0F2125 | 0.036 |
| Achromatopsia (no color) | #1E1E1E | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181D32
#181D32
oklch(23.7% 0.041 272.7)
- #251E05
#251E05
oklch(23.7% 0.041 93.8)
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 #181D32, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Dark #1B2431 ΔE 0.026
- Oxford Blue #1B263B ΔE 0.033
- Jet #212529 ΔE 0.041
- Navy Blue #001146 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.075
- Gunmetal #293241 ΔE 0.080
Use #181D32 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.