#210500
Closest named color: Very Dark Brown (#1D0200). oklch(16.9% 0.053 39.8), rgb(33, 5, 0).
Aa
White text reads best on this color (19.33:1).
About this color
#210500 is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.053 and its hue 40°. 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 19.33:1.
| Hue family | Reds |
| Lightness | very dark (17%) |
| Chroma | muted (0.053) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.08:1 |
| White text | 19.33:1 |
Values
| HEX | #210500 |
| RGB | rgb(33, 5, 0) |
| HSL | hsl(9, 100%, 6%) |
| OKLCH | oklch(16.9% 0.053 39.8) |
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 #210500 | 19.33:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210500 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #210500 text on white | 19.33:1 | AAA | Lc 105.3 | Preferred for body text |
| #210500 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EFD2C8
oklch(88.5% 0.035 40)
-
Step 300
300
#E5B4A2
oklch(80.9% 0.063 41.1)
-
Step 400
400
#D68B70
oklch(70.7% 0.1 40.5)
-
Step 500
500
#CA6B4A
oklch(63.1% 0.129 39.7)
-
Step 600
600
#B5512C
oklch(55.6% 0.14 40)
-
Step 700
700
#9C411F
oklch(49.2% 0.13 39.8)
-
Step 800
800
#7E361C
oklch(42.6% 0.107 39.6)
-
Step 900
900
#66301D
oklch(37.8% 0.084 39.7)
-
Step 950
950 (this color)
#210500
oklch(16.9% 0.053 39.8)
#210500 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) | #0D0A00 | 0.052 |
| Deuteranopia (no green cones) | #141000 | 0.047 |
| Tritanopia (no blue cones) | #260104 | 0.024 |
| Achromatopsia (no color) | #0E0E0E | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210500
#210500
oklch(16.9% 0.053 39.8)
- #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 #210500, 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 0.072
- Deep Brown #410200 ΔE 0.082
- Rich Navy #001219 ΔE 0.084
- Dark Brown #341C02 ΔE 0.088
- Rich Black #0D1B2A ΔE 0.099
- Chocolate Brown #411900 ΔE 0.103
Use #210500 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.