#210001
Closest named color: Very Dark Brown (#1D0200). oklch(15.6% 0.063 25.7), rgb(33, 0, 1).
Aa
White text reads best on this color (19.71:1).
About this color
#210001 is a very dark, muted red. In OKLCH its lightness is 16%, its chroma 0.063 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.014 away. White text reads best on it, at 19.71:1.
| Hue family | Reds |
| Lightness | very dark (16%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.71:1 |
Values
| HEX | #210001 |
| RGB | rgb(33, 0, 1) |
| HSL | hsl(358, 100%, 6%) |
| OKLCH | oklch(15.6% 0.063 25.7) |
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 #210001 | 19.71:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #210001 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #210001 text on white | 19.71:1 | AAA | Lc 105.3 | Preferred for body text |
| #210001 text on black | 1.06:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F4CFCB
oklch(88.5% 0.042 25.3)
-
Step 300
300
#EDAEA8
oklch(80.8% 0.075 25)
-
Step 400
400
#E28179
oklch(70.7% 0.121 25.6)
-
Step 500
500
#D65E57
oklch(63.1% 0.153 25.7)
-
Step 600
600
#C2403C
oklch(55.7% 0.167 25.9)
-
Step 700
700
#A7302E
oklch(49.1% 0.156 25.8)
-
Step 800
800
#872A27
oklch(42.6% 0.128 26)
-
Step 900
900
#6D2824
oklch(37.8% 0.099 26.2)
-
Step 950
950 (this color)
#210001
oklch(15.6% 0.063 25.7)
#210001 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) | #070601 | 0.071 |
| Deuteranopia (no green cones) | #110E00 | 0.064 |
| Tritanopia (no blue cones) | #260001 | 0.014 |
| Achromatopsia (no color) | #0B0B0B | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210001
#210001
oklch(15.6% 0.063 25.7)
- #001012
#001012
oklch(15.8% 0.027 203.9)
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 #210001, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.014
- Almost Black #070D0D ΔE 0.073
- Dark Maroon #3C0008 ΔE 0.075
- Deep Brown #410200 ΔE 0.088
- Rich Navy #001219 ΔE 0.095
- Dark Brown #341C02 ΔE 0.105
- Very Dark Purple #2A0134 ΔE 0.109
- Mahogany #4A0100 ΔE 0.110
Use #210001 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.