#370121
Closest named color: Dark Plum (#3F012C). oklch(22.3% 0.091 350.2), rgb(55, 1, 33).
Aa
White text reads best on this color (17.66:1).
About this color
#370121 is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.091 and its hue 350°. 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 17.66:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.18:1 |
| White text | 17.66:1 |
Values
| HEX | #370121 |
| RGB | rgb(55, 1, 33) |
| HSL | hsl(324, 96%, 11%) |
| OKLCH | oklch(22.3% 0.091 350.2) |
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 #370121 | 17.66:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #370121 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #370121 text on white | 17.66:1 | AAA | Lc 103.6 | Preferred for body text |
| #370121 text on black | 1.18:1 | 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
#FEF2F7
oklch(97.2% 0.014 350.1)
-
Step 100
100
#FBE2ED
oklch(93.6% 0.031 349.3)
-
Step 200
200
#F9CADE
oklch(88.5% 0.059 350.9)
-
Step 300
300
#F6A4CA
oklch(81% 0.107 350.4)
-
Step 400
400
#ED6DAF
oklch(70.7% 0.173 350.3)
-
Step 500
500
#E33B9B
oklch(63.1% 0.22 350.4)
-
Step 600
600
#CC0085
oklch(55.7% 0.232 350.5)
-
Step 700
700
#AC0070
oklch(49.1% 0.205 350.2)
-
Step 800
800
#8E005C
oklch(42.6% 0.178 350.1)
-
Step 900
900
#74104C
oklch(37.8% 0.143 350.1)
-
Step 950
950 (this color)
#370121
oklch(22.3% 0.091 350.2)
#370121 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) | #0A1222 | 0.104 |
| Deuteranopia (no green cones) | #1B1C20 | 0.089 |
| Tritanopia (no blue cones) | #3C0010 | 0.035 |
| Achromatopsia (no color) | #191919 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #370121
#370121
oklch(22.3% 0.091 350.2)
- #002218
#002218
oklch(22.4% 0.045 169.4)
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 #370121, 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 0.039
- Aubergine #3D0734 ΔE 0.039
- Dark Maroon #3C0008 ΔE 0.047
- Very Dark Purple #2A0134 ΔE 0.054
- Dark Purple #35063E ΔE 0.056
- Deep Purple #36013F ΔE 0.059
- Midnight Purple #280137 ΔE 0.062
Use #370121 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.