#40010B
Closest named color: Dark Maroon (#3C0008). oklch(23.6% 0.093 19.4), rgb(64, 1, 11).
Aa
White text reads best on this color (17.11:1).
About this color
#40010B is a very dark, moderately saturated red. In OKLCH its lightness is 24%, its chroma 0.093 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.012 away. White text reads best on it, at 17.11:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.22:1 |
| White text | 17.11:1 |
Values
| HEX | #40010B |
| RGB | rgb(64, 1, 11) |
| HSL | hsl(350, 97%, 13%) |
| OKLCH | oklch(23.6% 0.093 19.4) |
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 #40010B | 17.11:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #40010B | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #40010B text on white | 17.11:1 | AAA | Lc 102.9 | Preferred for body text |
| #40010B text on black | 1.22:1 | 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
#FFF2F2
oklch(97.1% 0.014 17.4)
-
Step 100
100
#FFE2E1
oklch(93.6% 0.032 20.1)
-
Step 200
200
#FFCAC9
oklch(88.5% 0.06 19.6)
-
Step 300
300
#FFA4A4
oklch(80.9% 0.108 19.7)
-
Step 400
400
#FB6B73
oklch(70.7% 0.176 19.4)
-
Step 500
500
#F3324F
oklch(63.1% 0.225 19.3)
-
Step 600
600
#D70039
oklch(55.6% 0.223 19.6)
-
Step 700
700
#B6002F
oklch(49.1% 0.197 19.5)
-
Step 800
800
#960025
oklch(42.6% 0.171 19.5)
-
Step 900
900
#7D061F
oklch(37.6% 0.147 19.5)
-
Step 950
950 (this color)
#40010B
oklch(23.6% 0.093 19.4)
#40010B 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) | #15130B | 0.104 |
| Deuteranopia (no green cones) | #252009 | 0.093 |
| Tritanopia (no blue cones) | #470005 | 0.019 |
| Achromatopsia (no color) | #1C1C1C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40010B
#40010B
oklch(23.6% 0.093 19.4)
- #002426
#002426
oklch(23.7% 0.04 200.3)
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 #40010B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.012
- Deep Brown #410200 ΔE 0.018
- Mahogany #4A0100 ΔE 0.030
- Chocolate Brown #411900 ΔE 0.058
- Dark Plum #3F012C ΔE 0.060
- Dark Brown #341C02 ΔE 0.069
- Aubergine #3D0734 ΔE 0.073
- Eggplant #380835 ΔE 0.078
Use #40010B 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.