#181A32
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.046 278.5), rgb(24, 26, 50).
Aa
White text reads best on this color (17.03:1).
About this color
#181A32 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.046 and its hue 278°. 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 17.03:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.03:1 |
Values
| HEX | #181A32 |
| RGB | rgb(24, 26, 50) |
| HSL | hsl(235, 35%, 15%) |
| OKLCH | oklch(22.9% 0.046 278.5) |
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 #181A32 | 17.03:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #181A32 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #181A32 text on white | 17.03:1 | AAA | Lc 103.9 | Preferred for body text |
| #181A32 text on black | 1.23:1 | 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D8EE
oklch(88.6% 0.03 277.6)
-
Step 300
300
#B8BEE4
oklch(80.9% 0.054 278.1)
-
Step 400
400
#949BD7
oklch(70.6% 0.088 278.7)
-
Step 500
500
#7A82CC
oklch(63.1% 0.111 278)
-
Step 600
600
#646AB9
oklch(55.6% 0.122 278.4)
-
Step 700
700
#53589F
oklch(49.1% 0.113 278.3)
-
Step 800
800
#444881
oklch(42.6% 0.094 278.6)
-
Step 900
900
#393D68
oklch(37.7% 0.073 278.2)
-
Step 950
950 (this color)
#181A32
oklch(22.9% 0.046 278.5)
#181A32 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) | #111D33 | 0.014 |
| Deuteranopia (no green cones) | #0F1B31 | 0.015 |
| Tritanopia (no blue cones) | #0F1F23 | 0.041 |
| Achromatopsia (no color) | #1C1C1C | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181A32
#181A32
oklch(22.9% 0.046 278.5)
- #221D01
#221D01
oklch(23% 0.046 99.8)
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 #181A32, 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 0.037
- Oxford Blue #1B263B ΔE 0.042
- Jet #212529 ΔE 0.051
- Navy Blue #001146 ΔE 0.062
- Rich Navy #001219 ΔE 0.072
- Midnight Purple #280137 ΔE 0.072
- Very Dark Purple #2A0134 ΔE 0.073
Use #181A32 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.