#180309
Closest named color: Very Dark Brown (#1D0200). oklch(14.6% 0.043 1.9), rgb(24, 3, 9).
Aa
White text reads best on this color (19.88:1).
About this color
#180309 is a very dark, muted red. In OKLCH its lightness is 15%, its chroma 0.043 and its hue 2°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.029 away. White text reads best on it, at 19.88:1.
| Hue family | Reds |
| Lightness | very dark (15%) |
| Chroma | muted (0.043) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.05:1 |
| White text | 19.88:1 |
Values
| HEX | #180309 |
| RGB | rgb(24, 3, 9) |
| HSL | hsl(343, 78%, 5%) |
| OKLCH | oklch(14.6% 0.043 1.9) |
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 #180309 | 19.88:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #180309 | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #180309 text on white | 19.88:1 | AAA | Lc 105.7 | Preferred for body text |
| #180309 text on black | 1.05:1 | 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
#FAF4F5
oklch(97.2% 0.007 5.6)
-
Step 100
100
#F3E6E9
oklch(93.6% 0.015 1.6)
-
Step 200
200
#EAD2D7
oklch(88.5% 0.027 3.5)
-
Step 300
300
#DEB3BE
oklch(80.8% 0.052 1.2)
-
Step 400
400
#CC8B9D
oklch(70.7% 0.082 1.3)
-
Step 500
500
#BD6D85
oklch(63% 0.105 1.3)
-
Step 600
600
#A8546E
oklch(55.5% 0.114 1.8)
-
Step 700
700
#90445C
oklch(49% 0.106 1.8)
-
Step 800
800
#75394B
oklch(42.7% 0.086 2.4)
-
Step 900
900
#5F313F
oklch(37.7% 0.069 1.5)
-
Step 950
950 (this color)
#180309
oklch(14.6% 0.043 1.9)
#180309 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) | #060709 | 0.048 |
| Deuteranopia (no green cones) | #0C0B08 | 0.044 |
| Tritanopia (no blue cones) | #1B0205 | 0.012 |
| Achromatopsia (no color) | #090909 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180309
#180309
oklch(14.6% 0.043 1.9)
- #000E0B
#000E0B
oklch(14.7% 0.027 180.7)
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 #180309, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.029
- Almost Black #070D0D ΔE 0.053
- Rich Navy #001219 ΔE 0.074
- Dark Maroon #3C0008 ΔE 0.094
- Rich Black #0D1B2A ΔE 0.096
- Very Dark Purple #2A0134 ΔE 0.097
- Midnight #03012D ΔE 0.099
- Midnight Purple #280137 ΔE 0.101
Use #180309 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.