#180103
Closest named color: Very Dark Brown (#1D0200). oklch(13.7% 0.049 17.4), rgb(24, 1, 3).
Aa
White text reads best on this color (20.10:1).
About this color
#180103 is a very dark, muted red. In OKLCH its lightness is 14%, its chroma 0.049 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.021 away. White text reads best on it, at 20.10:1.
| Hue family | Reds |
| Lightness | very dark (14%) |
| Chroma | muted (0.049) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.04:1 |
| White text | 20.10:1 |
Values
| HEX | #180103 |
| RGB | rgb(24, 1, 3) |
| HSL | hsl(355, 92%, 5%) |
| OKLCH | oklch(13.7% 0.049 17.4) |
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 #180103 | 20.10:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #180103 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #180103 text on white | 20.10:1 | AAA | Lc 105.7 | Preferred for body text |
| #180103 text on black | 1.04:1 | 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
#FBF3F3
oklch(97% 0.009 17.3)
-
Step 100
100
#F5E6E6
oklch(93.7% 0.016 17.4)
-
Step 200
200
#EED1D1
oklch(88.5% 0.033 17.8)
-
Step 300
300
#E4B2B3
oklch(80.9% 0.058 17.1)
-
Step 400
400
#D4898B
oklch(70.7% 0.092 17.9)
-
Step 500
500
#C7696F
oklch(63.1% 0.119 17.1)
-
Step 600
600
#B24F57
oklch(55.6% 0.129 17.3)
-
Step 700
700
#993F47
oklch(49.1% 0.121 17.3)
-
Step 800
800
#7C353B
oklch(42.7% 0.099 17.1)
-
Step 900
900
#642F32
oklch(37.7% 0.077 17.9)
-
Step 950
950 (this color)
#180103
oklch(13.7% 0.049 17.4)
#180103 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) | #050503 | 0.055 |
| Deuteranopia (no green cones) | #0B0903 | 0.049 |
| Tritanopia (no blue cones) | #1B0002 | 0.009 |
| Achromatopsia (no color) | #070707 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180103
#180103
oklch(13.7% 0.049 17.4)
- #000B0C
#000B0C
oklch(13.6% 0.023 200.3)
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 #180103, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.021
- Almost Black #070D0D ΔE 0.061
- Rich Navy #001219 ΔE 0.085
- Dark Maroon #3C0008 ΔE 0.098
- Rich Black #0D1B2A ΔE 0.111
- Very Dark Purple #2A0134 ΔE 0.112
- Deep Brown #410200 ΔE 0.112
- Midnight #03012D ΔE 0.112
Use #180103 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.