#370421
Closest named color: Dark Plum (#3F012C). oklch(22.7% 0.085 351.1), rgb(55, 4, 33).
Aa
White text reads best on this color (17.47:1).
About this color
#370421 is a very dark, moderately saturated red. In OKLCH its lightness is 23%, its chroma 0.085 and its hue 351°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.028 away. White text reads best on it, at 17.47:1.
| Hue family | Reds |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.085) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.20:1 |
| White text | 17.47:1 |
Values
| HEX | #370421 |
| RGB | rgb(55, 4, 33) |
| HSL | hsl(326, 86%, 12%) |
| OKLCH | oklch(22.7% 0.085 351.1) |
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 #370421 | 17.47:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #370421 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #370421 text on white | 17.47:1 | AAA | Lc 103.6 | Preferred for body text |
| #370421 text on black | 1.20:1 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE2EC
oklch(93.5% 0.029 350.5)
-
Step 200
200
#F8CBDE
oklch(88.6% 0.056 351.1)
-
Step 300
300
#F3A6C8
oklch(80.9% 0.1 351.5)
-
Step 400
400
#E971AD
oklch(70.6% 0.162 350.8)
-
Step 500
500
#DF4398
oklch(63.1% 0.207 351.2)
-
Step 600
600
#CA1083
oklch(55.6% 0.225 351)
-
Step 700
700
#AD006E
oklch(49.2% 0.204 351.3)
-
Step 800
800
#8D075A
oklch(42.6% 0.173 351)
-
Step 900
900
#72164A
oklch(37.7% 0.135 351.2)
-
Step 950
950 (this color)
#370421
oklch(22.7% 0.085 351.1)
#370421 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) | #0D1422 | 0.096 |
| Deuteranopia (no green cones) | #1C1D20 | 0.085 |
| Tritanopia (no blue cones) | #3C0111 | 0.032 |
| Achromatopsia (no color) | #1A1A1A | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #370421
#370421
oklch(22.7% 0.085 351.1)
- #00231A
#00231A
oklch(22.8% 0.044 171.9)
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 #370421, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.028
- Eggplant #380835 ΔE 0.038
- Aubergine #3D0734 ΔE 0.038
- Dark Maroon #3C0008 ΔE 0.045
- Very Dark Purple #2A0134 ΔE 0.056
- Dark Purple #35063E ΔE 0.056
- Deep Purple #36013F ΔE 0.060
- Deep Brown #410200 ΔE 0.062
Use #370421 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.