#3F100D
Closest named color: Deep Brown (#410200). oklch(25.3% 0.074 27.3), rgb(63, 16, 13).
Aa
White text reads best on this color (16.26:1).
About this color
#3F100D is a dark, moderately saturated red. In OKLCH its lightness is 25%, its chroma 0.074 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.026 away. White text reads best on it, at 16.26:1.
| Hue family | Reds |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.29:1 |
| White text | 16.26:1 |
Values
| HEX | #3F100D |
| RGB | rgb(63, 16, 13) |
| HSL | hsl(4, 66%, 15%) |
| OKLCH | oklch(25.3% 0.074 27.3) |
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 #3F100D | 16.26:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #3F100D | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #3F100D text on white | 16.26:1 | AAA | Lc 102.7 | Preferred for body text |
| #3F100D text on black | 1.29:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F8CEC8
oklch(88.6% 0.048 27.6)
-
Step 300
300
#F4ABA2
oklch(80.9% 0.088 27)
-
Step 400
400
#EB7B6F
oklch(70.7% 0.14 27.5)
-
Step 500
500
#E15349
oklch(63.1% 0.179 27.4)
-
Step 600
600
#CD2F2B
oklch(55.7% 0.195 27.4)
-
Step 700
700
#B11E1E
oklch(49.2% 0.182 27.2)
-
Step 800
800
#8F1D1B
oklch(42.6% 0.15 27.1)
-
Step 900
900
#73201C
oklch(37.6% 0.117 27.1)
-
Step 950
950 (this color)
#3F100D
oklch(25.3% 0.074 27.3)
#3F100D 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) | #1D1A0C | 0.078 |
| Deuteranopia (no green cones) | #29240C | 0.072 |
| Tritanopia (no blue cones) | #460510 | 0.024 |
| Achromatopsia (no color) | #202020 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F100D
#3F100D
oklch(25.3% 0.074 27.3)
- #00282D
#00282D
oklch(25.3% 0.043 207.4)
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 #3F100D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.026
- Mahogany #4A0100 ΔE 0.031
- Chocolate Brown #411900 ΔE 0.033
- Dark Maroon #3C0008 ΔE 0.034
- Dark Brown #341C02 ΔE 0.045
- Dark Plum #3F012C ΔE 0.070
- Aubergine #3D0734 ΔE 0.078
- Jet #212529 ΔE 0.082
Use #3F100D 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.