#3F0103
Closest named color: Deep Brown (#410200). oklch(23.3% 0.093 26.6), rgb(63, 1, 3).
Aa
White text reads best on this color (17.25:1).
About this color
#3F0103 is a very dark, moderately saturated red. In OKLCH its lightness is 23%, its chroma 0.093 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 17.25:1.
| Hue family | Reds |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.21:1 |
| White text | 17.25:1 |
Values
| HEX | #3F0103 |
| RGB | rgb(63, 1, 3) |
| HSL | hsl(358, 97%, 13%) |
| OKLCH | oklch(23.3% 0.093 26.6) |
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 #3F0103 | 17.25:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #3F0103 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #3F0103 text on white | 17.25:1 | AAA | Lc 103.1 | Preferred for body text |
| #3F0103 text on black | 1.21:1 | 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
#FFE2DF
oklch(93.6% 0.032 24.8)
-
Step 200
200
#FFCBC4
oklch(88.6% 0.06 27.2)
-
Step 300
300
#FFA59B
oklch(80.9% 0.108 26.6)
-
Step 400
400
#FB6D63
oklch(70.7% 0.176 26.5)
-
Step 500
500
#F43635
oklch(63.2% 0.225 26.8)
-
Step 600
600
#D8001A
oklch(55.5% 0.226 26.6)
-
Step 700
700
#B70014
oklch(49% 0.2 26.6)
-
Step 800
800
#98000F
oklch(42.8% 0.174 26.5)
-
Step 900
900
#7D090F
oklch(37.6% 0.146 26.5)
-
Step 950
950 (this color)
#3F0103
oklch(23.3% 0.093 26.6)
#3F0103 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) | #151202 | 0.103 |
| Deuteranopia (no green cones) | #252001 | 0.093 |
| Tritanopia (no blue cones) | #470002 | 0.020 |
| Achromatopsia (no color) | #1B1B1B | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F0103
#3F0103
oklch(23.3% 0.093 26.6)
- #002327
#002327
oklch(23.4% 0.04 205.9)
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 #3F0103, 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 0.013
- Mahogany #4A0100 ΔE 0.028
- Chocolate Brown #411900 ΔE 0.053
- Dark Brown #341C02 ΔE 0.064
- Dark Plum #3F012C ΔE 0.072
- Aubergine #3D0734 ΔE 0.085
- Eggplant #380835 ΔE 0.089
Use #3F0103 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.