#210501
Closest named color: Very Dark Brown (#1D0200). oklch(16.9% 0.052 36.4), rgb(33, 5, 1).
Aa
White text reads best on this color (19.32:1).
About this color
#210501 is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.052 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.018 away. White text reads best on it, at 19.32:1.
| Hue family | Reds |
| Lightness | very dark (17%) |
| Chroma | muted (0.052) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.08:1 |
| White text | 19.32:1 |
Values
| HEX | #210501 |
| RGB | rgb(33, 5, 1) |
| HSL | hsl(8, 94%, 7%) |
| OKLCH | oklch(16.9% 0.052 36.4) |
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 #210501 | 19.32:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210501 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #210501 text on white | 19.32:1 | AAA | Lc 105.3 | Preferred for body text |
| #210501 text on black | 1.08:1 | 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
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EFD2CA
oklch(88.6% 0.034 35.9)
-
Step 300
300
#E5B3A5
oklch(80.8% 0.062 36.2)
-
Step 400
400
#D68A75
oklch(70.6% 0.099 36.2)
-
Step 500
500
#C96B51
oklch(63.1% 0.126 36.4)
-
Step 600
600
#B55135
oklch(55.7% 0.137 36.5)
-
Step 700
700
#9B4127
oklch(49.1% 0.127 36.8)
-
Step 800
800
#7E3622
oklch(42.7% 0.105 36.4)
-
Step 900
900
#663021
oklch(37.8% 0.082 36.4)
-
Step 950
950 (this color)
#210501
oklch(16.9% 0.052 36.4)
#210501 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) | #0D0A01 | 0.052 |
| Deuteranopia (no green cones) | #141001 | 0.047 |
| Tritanopia (no blue cones) | #250104 | 0.020 |
| Achromatopsia (no color) | #0E0E0E | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210501
#210501
oklch(16.9% 0.052 36.4)
- #001218
#001218
oklch(16.8% 0.03 219.2)
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 #210501, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.018
- Almost Black #070D0D ΔE 0.064
- Dark Maroon #3C0008 ΔE 0.071
- Deep Brown #410200 ΔE 0.081
- Rich Navy #001219 ΔE 0.083
- Dark Brown #341C02 ΔE 0.089
- Rich Black #0D1B2A ΔE 0.097
- Chocolate Brown #411900 ΔE 0.104
Use #210501 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.