#3F0000
Closest named color: Deep Brown (#410200). oklch(23.1% 0.095 29.2), rgb(63, 0, 0).
Aa
White text reads best on this color (17.33:1).
About this color
#3F0000 is a very dark, moderately saturated red. In OKLCH its lightness is 23%, its chroma 0.095 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.007 away. White text reads best on it, at 17.33:1.
| Hue family | Reds |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.095) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.21:1 |
| White text | 17.33:1 |
Values
| HEX | #3F0000 |
| RGB | rgb(63, 0, 0) |
| HSL | hsl(0, 100%, 12%) |
| OKLCH | oklch(23.1% 0.095 29.2) |
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 #3F0000 | 17.33:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #3F0000 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #3F0000 text on white | 17.33:1 | AAA | Lc 103.1 | Preferred for body text |
| #3F0000 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
#FFE2DD
oklch(93.5% 0.033 29.4)
-
Step 200
200
#FFCBC2
oklch(88.5% 0.061 29.7)
-
Step 300
300
#FFA698
oklch(81% 0.108 29.4)
-
Step 400
400
#FC6C5B
oklch(70.6% 0.179 29.1)
-
Step 500
500
#F53326
oklch(63% 0.23 29.2)
-
Step 600
600
#D90000
oklch(55.6% 0.228 29.2)
-
Step 700
700
#B80000
oklch(49.1% 0.202 29.2)
-
Step 800
800
#980000
oklch(42.7% 0.175 29.2)
-
Step 900
900
#7E0704
oklch(37.6% 0.149 29.2)
-
Step 950
950 (this color)
#3F0000
oklch(23.1% 0.095 29.2)
#3F0000 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) | #151100 | 0.104 |
| Deuteranopia (no green cones) | #251F00 | 0.091 |
| Tritanopia (no blue cones) | #470001 | 0.021 |
| Achromatopsia (no color) | #1A1A1A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F0000
#3F0000
oklch(23.1% 0.095 29.2)
- #002227
#002227
oklch(23.1% 0.04 208.9)
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 #3F0000, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.007
- Dark Maroon #3C0008 ΔE 0.016
- Mahogany #4A0100 ΔE 0.029
- Chocolate Brown #411900 ΔE 0.053
- Dark Brown #341C02 ΔE 0.064
- Dark Plum #3F012C ΔE 0.077
- Aubergine #3D0734 ΔE 0.090
- Very Dark Brown #1D0200 ΔE 0.090
Use #3F0000 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.