#3F171B
Closest named color: Chocolate Brown (#411900). oklch(26.7% 0.063 16.2), rgb(63, 23, 27).
Aa
White text reads best on this color (15.55:1).
About this color
#3F171B is a dark, muted red. In OKLCH its lightness is 27%, its chroma 0.063 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.039 away. White text reads best on it, at 15.55:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.34:1 |
| White text | 15.55:1 |
Values
| HEX | #3F171B |
| RGB | rgb(63, 23, 27) |
| HSL | hsl(354, 47%, 17%) |
| OKLCH | oklch(26.7% 0.063 16.2) |
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 #3F171B | 15.55:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #3F171B | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #3F171B text on white | 15.55:1 | AAA | Lc 102.2 | Preferred for body text |
| #3F171B text on black | 1.34:1 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F8E4E5
oklch(93.5% 0.022 14.1)
-
Step 200
200
#F3CFD0
oklch(88.5% 0.041 16)
-
Step 300
300
#EDAEB0
oklch(81% 0.074 16.7)
-
Step 400
400
#E18087
oklch(70.7% 0.12 16)
-
Step 500
500
#D55D69
oklch(63.1% 0.151 16.4)
-
Step 600
600
#C03F51
oklch(55.6% 0.164 16.2)
-
Step 700
700
#A52F42
oklch(49% 0.153 15.8)
-
Step 800
800
#862936
oklch(42.6% 0.126 16.3)
-
Step 900
900
#6C272F
oklch(37.7% 0.098 16.2)
-
Step 950
950 (this color)
#3F171B
oklch(26.7% 0.063 16.2)
#3F171B 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) | #201F1B | 0.068 |
| Deuteranopia (no green cones) | #2A271A | 0.063 |
| Tritanopia (no blue cones) | #451119 | 0.017 |
| Achromatopsia (no color) | #242424 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F171B
#3F171B
oklch(26.7% 0.063 16.2)
- #002C2D
#002C2D
oklch(26.6% 0.045 197.1)
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 #3F171B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.039
- Mahogany #4A0100 ΔE 0.047
- Deep Brown #410200 ΔE 0.047
- Dark Brown #341C02 ΔE 0.050
- Dark Maroon #3C0008 ΔE 0.051
- Dark Plum #3F012C ΔE 0.063
- Aubergine #3D0734 ΔE 0.067
- Jet #212529 ΔE 0.069
Use #3F171B 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.