#181A34
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.05 278.4), rgb(24, 26, 52).
Aa
White text reads best on this color (16.98:1).
About this color
#181A34 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.050 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 16.98:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.98:1 |
Values
| HEX | #181A34 |
| RGB | rgb(24, 26, 52) |
| HSL | hsl(236, 37%, 15%) |
| OKLCH | oklch(23.1% 0.05 278.4) |
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 #181A34 | 16.98:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #181A34 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #181A34 text on white | 16.98:1 | AAA | Lc 103.8 | Preferred for body text |
| #181A34 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D7EF
oklch(88.4% 0.033 280)
-
Step 300
300
#B7BDE7
oklch(80.8% 0.06 278.6)
-
Step 400
400
#939BDB
oklch(70.8% 0.094 278.2)
-
Step 500
500
#7981D1
oklch(63.1% 0.12 278)
-
Step 600
600
#6369BE
oklch(55.6% 0.13 278.2)
-
Step 700
700
#5257A4
oklch(49.1% 0.122 278.1)
-
Step 800
800
#434785
oklch(42.6% 0.102 278.4)
-
Step 900
900
#383C6B
oklch(37.6% 0.08 278.1)
-
Step 950
950 (this color)
#181A34
oklch(23.1% 0.05 278.4)
#181A34 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) | #101D35 | 0.015 |
| Deuteranopia (no green cones) | #0E1B33 | 0.016 |
| Tritanopia (no blue cones) | #0E1F24 | 0.043 |
| Achromatopsia (no color) | #1C1C1C | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181A34
#181A34
oklch(23.1% 0.05 278.4)
- #231D00
#231D00
oklch(23.1% 0.048 98.3)
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 #181A34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Dark #1B2431 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.041
- Jet #212529 ΔE 0.052
- Navy Blue #001146 ΔE 0.059
- Midnight Purple #280137 ΔE 0.070
- Very Dark Purple #2A0134 ΔE 0.072
- Dark Indigo #1F0954 ΔE 0.073
Use #181A34 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.