#3F0304
Closest named color: Deep Brown (#410200). oklch(23.5% 0.09 26.9), rgb(63, 3, 4).
Aa
White text reads best on this color (17.12:1).
About this color
#3F0304 is a very dark, moderately saturated red. In OKLCH its lightness is 24%, its chroma 0.090 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.008 away. White text reads best on it, at 17.12:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.090) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.22:1 |
| White text | 17.12:1 |
Values
| HEX | #3F0304 |
| RGB | rgb(63, 3, 4) |
| HSL | hsl(359, 91%, 13%) |
| OKLCH | oklch(23.5% 0.09 26.9) |
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 #3F0304 | 17.12:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #3F0304 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #3F0304 text on white | 17.12:1 | AAA | Lc 103.1 | Preferred for body text |
| #3F0304 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DF
oklch(93.7% 0.03 27.8)
-
Step 200
200
#FECBC4
oklch(88.5% 0.059 27.4)
-
Step 300
300
#FEA69B
oklch(80.9% 0.106 27.4)
-
Step 400
400
#F96F64
oklch(70.7% 0.171 26.9)
-
Step 500
500
#F13B38
oklch(63.1% 0.218 26.8)
-
Step 600
600
#D90018
oklch(55.7% 0.227 26.9)
-
Step 700
700
#B70013
oklch(49% 0.2 26.8)
-
Step 800
800
#98000D
oklch(42.8% 0.174 27)
-
Step 900
900
#7C0E11
oklch(37.7% 0.143 26.7)
-
Step 950
950 (this color)
#3F0304
oklch(23.5% 0.09 26.9)
#3F0304 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) | #161303 | 0.100 |
| Deuteranopia (no green cones) | #252002 | 0.089 |
| Tritanopia (no blue cones) | #460004 | 0.017 |
| Achromatopsia (no color) | #1C1C1C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F0304
#3F0304
oklch(23.5% 0.09 26.9)
- #002328
#002328
oklch(23.4% 0.04 208.6)
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 #3F0304, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.008
- Dark Maroon #3C0008 ΔE 0.014
- Mahogany #4A0100 ΔE 0.027
- Chocolate Brown #411900 ΔE 0.050
- Dark Brown #341C02 ΔE 0.061
- Dark Plum #3F012C ΔE 0.072
- Aubergine #3D0734 ΔE 0.084
- Eggplant #380835 ΔE 0.088
Use #3F0304 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.