#3F0B01
Closest named color: Deep Brown (#410200). oklch(24.4% 0.083 35.2), rgb(63, 11, 1).
Aa
White text reads best on this color (16.67:1).
About this color
#3F0B01 is a very dark, moderately saturated red. In OKLCH its lightness is 24%, its chroma 0.083 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.015 away. White text reads best on it, at 16.67:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.083) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.25:1 |
| White text | 16.67:1 |
Values
| HEX | #3F0B01 |
| RGB | rgb(63, 11, 1) |
| HSL | hsl(10, 97%, 13%) |
| OKLCH | oklch(24.4% 0.083 35.2) |
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 #3F0B01 | 16.67:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #3F0B01 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #3F0B01 text on white | 16.67:1 | AAA | Lc 102.9 | Preferred for body text |
| #3F0B01 text on black | 1.25:1 | 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
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FCE4DD
oklch(93.6% 0.028 36.9)
-
Step 200
200
#FBCDC1
oklch(88.5% 0.055 35)
-
Step 300
300
#F9AA96
oklch(81% 0.098 34.8)
-
Step 400
400
#F17859
oklch(70.7% 0.156 35.4)
-
Step 500
500
#E94C22
oklch(63.2% 0.2 35.2)
-
Step 600
600
#CB3400
oklch(55.5% 0.194 35.2)
-
Step 700
700
#AC2B00
oklch(49.1% 0.171 35.3)
-
Step 800
800
#8E2100
oklch(42.6% 0.149 35.1)
-
Step 900
900
#771B01
oklch(37.6% 0.13 35.1)
-
Step 950
950 (this color)
#3F0B01
oklch(24.4% 0.083 35.2)
#3F0B01 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) | #1B1700 | 0.086 |
| Deuteranopia (no green cones) | #282200 | 0.077 |
| Tritanopia (no blue cones) | #460009 | 0.028 |
| Achromatopsia (no color) | #1E1E1E | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F0B01
#3F0B01
oklch(24.4% 0.083 35.2)
- #00252D
#00252D
oklch(24.4% 0.043 215.6)
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 #3F0B01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.015
- Mahogany #4A0100 ΔE 0.027
- Dark Maroon #3C0008 ΔE 0.030
- Chocolate Brown #411900 ΔE 0.033
- Dark Brown #341C02 ΔE 0.045
- Dark Plum #3F012C ΔE 0.081
- Aubergine #3D0734 ΔE 0.091
- Jet #212529 ΔE 0.093
Use #3F0B01 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.