#181547
Closest named color: Dark Indigo (#1F0954). oklch(23.6% 0.09 279.6), rgb(24, 21, 71).
Aa
White text reads best on this color (16.97:1).
About this color
#181547 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.090 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.034 away. White text reads best on it, at 16.97:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.23:1 |
| White text | 16.97:1 |
Values
| HEX | #181547 |
| RGB | rgb(24, 21, 71) |
| HSL | hsl(244, 54%, 18%) |
| OKLCH | oklch(23.6% 0.09 279.6) |
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 #181547 | 16.97:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #181547 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #181547 text on white | 16.97:1 | AAA | Lc 103.6 | Preferred for body text |
| #181547 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D1D6FF
oklch(88.5% 0.057 279.7)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7573FF
oklch(63% 0.202 279.5)
-
Step 600
600
#6151F8
oklch(55.6% 0.238 279.6)
-
Step 700
700
#5140D8
oklch(49.1% 0.22 279.6)
-
Step 800
800
#4236AE
oklch(42.6% 0.182 279.8)
-
Step 900
900
#36318A
oklch(37.6% 0.143 279.5)
-
Step 950
950 (this color)
#181547
oklch(23.6% 0.09 279.6)
#181547 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) | #001E49 | 0.035 |
| Deuteranopia (no green cones) | #001A46 | 0.033 |
| Tritanopia (no blue cones) | #00212B | 0.077 |
| Achromatopsia (no color) | #1C1C1C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181547
#181547
oklch(23.6% 0.09 279.6)
- #241E00
#241E00
oklch(23.5% 0.049 98.6)
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 #181547, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.034
- Navy Blue #001146 ΔE 0.040
- Night Blue #040348 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.061
- Midnight Purple #280137 ΔE 0.063
- Rich Black #0D1B2A ΔE 0.064
- Darkblue #030764 ΔE 0.067
- Very Dark Purple #2A0134 ΔE 0.069
Use #181547 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.