#210100
Closest named color: Very Dark Brown (#1D0200). oklch(15.8% 0.061 31.3), rgb(33, 1, 0).
Aa
White text reads best on this color (19.64:1).
About this color
#210100 is a very dark, muted red. In OKLCH its lightness is 16%, its chroma 0.061 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.011 away. White text reads best on it, at 19.64:1.
| Hue family | Reds |
| Lightness | very dark (16%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.64:1 |
Values
| HEX | #210100 |
| RGB | rgb(33, 1, 0) |
| HSL | hsl(2, 100%, 6%) |
| OKLCH | oklch(15.8% 0.061 31.3) |
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 #210100 | 19.64:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #210100 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #210100 text on white | 19.64:1 | AAA | Lc 105.3 | Preferred for body text |
| #210100 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F3D0C9
oklch(88.5% 0.041 31.2)
-
Step 300
300
#ECB0A4
oklch(81% 0.073 31.5)
-
Step 400
400
#DF8473
oklch(70.7% 0.116 31.4)
-
Step 500
500
#D4624F
oklch(63.2% 0.148 31.2)
-
Step 600
600
#BF4532
oklch(55.6% 0.161 31.4)
-
Step 700
700
#A53525
oklch(49.2% 0.15 31)
-
Step 800
800
#862D20
oklch(42.7% 0.125 31)
-
Step 900
900
#6C2A1F
oklch(37.8% 0.097 31.5)
-
Step 950
950 (this color)
#210100
oklch(15.8% 0.061 31.3)
#210100 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) | #090700 | 0.065 |
| Deuteranopia (no green cones) | #120E00 | 0.057 |
| Tritanopia (no blue cones) | #260001 | 0.014 |
| Achromatopsia (no color) | #0B0B0B | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210100
#210100
oklch(15.8% 0.061 31.3)
- #001014
#001014
oklch(15.9% 0.028 212.7)
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 #210100, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.011
- Almost Black #070D0D ΔE 0.071
- Dark Maroon #3C0008 ΔE 0.074
- Deep Brown #410200 ΔE 0.086
- Rich Navy #001219 ΔE 0.093
- Dark Brown #341C02 ΔE 0.101
- Mahogany #4A0100 ΔE 0.109
- Rich Black #0D1B2A ΔE 0.109
Use #210100 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.