#370021
Closest named color: Dark Plum (#3F012C). oklch(22.2% 0.093 349.9), rgb(55, 0, 33).
Aa
White text reads best on this color (17.73:1).
About this color
#370021 is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.093 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 17.73:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.18:1 |
| White text | 17.73:1 |
Values
| HEX | #370021 |
| RGB | rgb(55, 0, 33) |
| HSL | hsl(324, 100%, 11%) |
| OKLCH | oklch(22.2% 0.093 349.9) |
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 #370021 | 17.73:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #370021 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #370021 text on white | 17.73:1 | AAA | Lc 103.6 | Preferred for body text |
| #370021 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
#FCE2ED
oklch(93.7% 0.032 350.2)
-
Step 200
200
#FAC9DF
oklch(88.5% 0.062 349.7)
-
Step 300
300
#F7A3CB
oklch(80.9% 0.111 349.8)
-
Step 400
400
#EE6CB0
oklch(70.7% 0.176 350)
-
Step 500
500
#E4389C
oklch(63.1% 0.224 350)
-
Step 600
600
#CB0086
oklch(55.5% 0.232 349.9)
-
Step 700
700
#AC0071
oklch(49.1% 0.205 349.8)
-
Step 800
800
#8E005C
oklch(42.6% 0.178 350.1)
-
Step 900
900
#750D4C
oklch(37.8% 0.146 350.3)
-
Step 950
950 (this color)
#370021
oklch(22.2% 0.093 349.9)
#370021 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) | #091222 | 0.106 |
| Deuteranopia (no green cones) | #1A1C20 | 0.092 |
| Tritanopia (no blue cones) | #3C000F | 0.038 |
| Achromatopsia (no color) | #181818 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #370021
#370021
oklch(22.2% 0.093 349.9)
- #002118
#002118
oklch(22.1% 0.043 171.1)
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 #370021, 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 0.040
- Dark Maroon #3C0008 ΔE 0.048
- Very Dark Purple #2A0134 ΔE 0.053
- Dark Purple #35063E ΔE 0.056
- Deep Purple #36013F ΔE 0.059
- Midnight Purple #280137 ΔE 0.061
Use #370021 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.