#370017
Closest named color: Dark Maroon (#3C0008). oklch(21.8% 0.088 1.8), rgb(55, 0, 23).
Aa
White text reads best on this color (17.87:1).
About this color
#370017 is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.088 and its hue 2°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.030 away. White text reads best on it, at 17.87:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.17:1 |
| White text | 17.87:1 |
Values
| HEX | #370017 |
| RGB | rgb(55, 0, 23) |
| HSL | hsl(335, 100%, 11%) |
| OKLCH | oklch(21.8% 0.088 1.8) |
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 #370017 | 17.87:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #370017 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #370017 text on white | 17.87:1 | AAA | Lc 103.7 | Preferred for body text |
| #370017 text on black | 1.17:1 | 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
#FEF2F5
oklch(97.1% 0.013 0.3)
-
Step 100
100
#FCE2E8
oklch(93.6% 0.03 2)
-
Step 200
200
#FBCAD6
oklch(88.5% 0.057 2)
-
Step 300
300
#F9A4BC
oklch(80.9% 0.104 1.3)
-
Step 400
400
#F16E99
oklch(70.7% 0.166 1.6)
-
Step 500
500
#E83C80
oklch(63.1% 0.213 1.7)
-
Step 600
600
#D1006A
oklch(55.6% 0.225 1.6)
-
Step 700
700
#B10058
oklch(49.1% 0.198 2)
-
Step 800
800
#920048
oklch(42.6% 0.172 1.7)
-
Step 900
900
#77103C
oklch(37.7% 0.139 1.8)
-
Step 950
950 (this color)
#370017
oklch(21.8% 0.088 1.8)
#370017 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) | #0D1018 | 0.101 |
| Deuteranopia (no green cones) | #1D1B16 | 0.088 |
| Tritanopia (no blue cones) | #3D0009 | 0.030 |
| Achromatopsia (no color) | #171717 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #370017
#370017
oklch(21.8% 0.088 1.8)
- #00201B
#00201B
oklch(21.8% 0.039 180.5)
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 #370017, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.030
- Dark Plum #3F012C ΔE 0.043
- Deep Brown #410200 ΔE 0.050
- Aubergine #3D0734 ΔE 0.056
- Eggplant #380835 ΔE 0.057
- Mahogany #4A0100 ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.069
- Dark Purple #35063E ΔE 0.075
Use #370017 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.