#181C01
Closest named color: Dark Brown (#341C02). oklch(21.5% 0.048 117.1), rgb(24, 28, 1).
Aa
White text reads best on this color (17.42:1).
About this color
#181C01 is a very dark, muted brown. In OKLCH its lightness is 21%, its chroma 0.048 and its hue 117°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Brown (#341C02), ΔE 0.060 away. White text reads best on it, at 17.42:1.
| Hue family | Browns |
| Lightness | very dark (21%) |
| Chroma | muted (0.048) |
| Temperature | in between |
| Nearest name | Dark Brown (#341C02) |
| Black text | 1.20:1 |
| White text | 17.42:1 |
Values
| HEX | #181C01 |
| RGB | rgb(24, 28, 1) |
| HSL | hsl(69, 93%, 6%) |
| OKLCH | oklch(21.5% 0.048 117.1) |
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 #181C01 | 17.42:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #181C01 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #181C01 text on white | 17.42:1 | AAA | Lc 104.2 | Preferred for body text |
| #181C01 text on black | 1.20:1 | 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
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBDF
oklch(93.5% 0.016 114.4)
-
Step 200
200
#D7DCC5
oklch(88.4% 0.031 117)
-
Step 300
300
#BDC69D
oklch(80.9% 0.056 117.7)
-
Step 400
400
#9CA866
oklch(70.6% 0.09 117.2)
-
Step 500
500
#859239
oklch(63.1% 0.115 116.8)
-
Step 600
600
#6F7C0A
oklch(55.6% 0.125 116.9)
-
Step 700
700
#5D6800
oklch(49.1% 0.113 116.8)
-
Step 800
800
#4C5504
oklch(42.7% 0.096 116.7)
-
Step 900
900
#3F4611
oklch(37.6% 0.074 116.6)
-
Step 950
950 (this color)
#181C01
oklch(21.5% 0.048 117.1)
#181C01 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) | #1F1A00 | 0.014 |
| Deuteranopia (no green cones) | #1E1A02 | 0.014 |
| Tritanopia (no blue cones) | #1A1A16 | 0.040 |
| Achromatopsia (no color) | #1A1A1A | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181C01
#181C01
oklch(21.5% 0.048 117.1)
- #1C142C
#1C142C
oklch(21.5% 0.047 297.7)
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 #181C01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Brown #341C02 ΔE 0.060
- Dark Forest Green #002D04 ΔE 0.063
- Very Dark Green #062E03 ΔE 0.066
- Jet #212529 ΔE 0.072
- Rich Black #0D1B2A ΔE 0.077
- Almost Black #070D0D ΔE 0.078
- Rich Navy #001219 ΔE 0.078
- Dark #1B2431 ΔE 0.083
Use #181C01 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.