#180503
Closest named color: Very Dark Brown (#1D0200). oklch(15% 0.037 31.7), rgb(24, 5, 3).
Aa
White text reads best on this color (19.77:1).
About this color
#180503 is a very dark, muted red. In OKLCH its lightness is 15%, its chroma 0.037 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.017 away. White text reads best on it, at 19.77:1.
| Hue family | Reds |
| Lightness | very dark (15%) |
| Chroma | muted (0.037) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.77:1 |
Values
| HEX | #180503 |
| RGB | rgb(24, 5, 3) |
| HSL | hsl(6, 78%, 5%) |
| OKLCH | oklch(15% 0.037 31.7) |
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 #180503 | 19.77:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #180503 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #180503 text on white | 19.77:1 | AAA | Lc 105.7 | Preferred for body text |
| #180503 text on black | 1.06:1 | 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
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F2E7E5
oklch(93.6% 0.012 29.9)
-
Step 200
200
#E9D4CF
oklch(88.6% 0.024 33.6)
-
Step 300
300
#DCB7AF
oklch(81% 0.044 32.3)
-
Step 400
400
#C99185
oklch(70.8% 0.071 32.4)
-
Step 500
500
#B97567
oklch(63.1% 0.089 32.3)
-
Step 600
600
#A55C4F
oklch(55.6% 0.098 31.1)
-
Step 700
700
#8D4C3F
oklch(49.2% 0.091 32.4)
-
Step 800
800
#733E34
oklch(42.7% 0.076 31.7)
-
Step 900
900
#5D352E
oklch(37.7% 0.059 30.7)
-
Step 950
950 (this color)
#180503
oklch(15% 0.037 31.7)
#180503 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) | #090803 | 0.039 |
| Deuteranopia (no green cones) | #0E0C03 | 0.035 |
| Tritanopia (no blue cones) | #1B0305 | 0.014 |
| Achromatopsia (no color) | #0A0A0A | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180503
#180503
oklch(15% 0.037 31.7)
- #000E11
#000E11
oklch(15% 0.026 209.3)
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 #180503, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.017
- Almost Black #070D0D ΔE 0.047
- Rich Navy #001219 ΔE 0.071
- Dark Maroon #3C0008 ΔE 0.093
- Rich Black #0D1B2A ΔE 0.096
- Deep Brown #410200 ΔE 0.105
- Dark Brown #341C02 ΔE 0.108
- Midnight #03012D ΔE 0.112
Use #180503 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.