#3F180A
Closest named color: Chocolate Brown (#411900). oklch(26.6% 0.065 39.6), rgb(63, 24, 10).
Aa
White text reads best on this color (15.59:1).
About this color
#3F180A is a dark, muted red. In OKLCH its lightness is 27%, its chroma 0.065 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.014 away. White text reads best on it, at 15.59:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.34:1 |
| White text | 15.59:1 |
Values
| HEX | #3F180A |
| RGB | rgb(63, 24, 10) |
| HSL | hsl(16, 73%, 14%) |
| OKLCH | oklch(26.6% 0.065 39.6) |
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 #3F180A | 15.59:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #3F180A | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #3F180A text on white | 15.59:1 | AAA | Lc 102.2 | Preferred for body text |
| #3F180A 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F4D0C4
oklch(88.5% 0.044 39.3)
-
Step 300
300
#EDB09B
oklch(80.9% 0.078 39.8)
-
Step 400
400
#E28464
oklch(70.8% 0.125 39.5)
-
Step 500
500
#D66137
oklch(63% 0.158 39.6)
-
Step 600
600
#C24308
oklch(55.6% 0.173 39.5)
-
Step 700
700
#A53600
oklch(49% 0.155 39.6)
-
Step 800
800
#882C03
oklch(42.7% 0.133 39.4)
-
Step 900
900
#6D2910
oklch(37.6% 0.103 39.3)
-
Step 950
950 (this color)
#3F180A
oklch(26.6% 0.065 39.6)
#3F180A 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) | #231E08 | 0.063 |
| Deuteranopia (no green cones) | #2C2709 | 0.059 |
| Tritanopia (no blue cones) | #461015 | 0.031 |
| Achromatopsia (no color) | #242424 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F180A
#3F180A
oklch(26.6% 0.065 39.6)
- #002B35
#002B35
oklch(26.7% 0.048 217.8)
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 #3F180A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.014
- Dark Brown #341C02 ΔE 0.031
- Deep Brown #410200 ΔE 0.042
- Mahogany #4A0100 ΔE 0.042
- Dark Maroon #3C0008 ΔE 0.054
- Jet #212529 ΔE 0.074
- Dark Plum #3F012C ΔE 0.087
- Dark #1B2431 ΔE 0.089
Use #3F180A 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.