#210308
Closest named color: Very Dark Brown (#1D0200). oklch(16.6% 0.055 12.6), rgb(33, 3, 8).
Aa
White text reads best on this color (19.42:1).
About this color
#210308 is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.055 and its hue 13°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.026 away. White text reads best on it, at 19.42:1.
| Hue family | Reds |
| Lightness | very dark (17%) |
| Chroma | muted (0.055) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.08:1 |
| White text | 19.42:1 |
Values
| HEX | #210308 |
| RGB | rgb(33, 3, 8) |
| HSL | hsl(350, 83%, 7%) |
| OKLCH | oklch(16.6% 0.055 12.6) |
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 #210308 | 19.42:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210308 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #210308 text on white | 19.42:1 | AAA | Lc 105.3 | Preferred for body text |
| #210308 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
#FBF3F4
oklch(97.1% 0.009 8.5)
-
Step 100
100
#F6E5E6
oklch(93.6% 0.019 13.4)
-
Step 200
200
#F0D0D2
oklch(88.5% 0.036 13.6)
-
Step 300
300
#E7B0B5
oklch(80.9% 0.065 12.5)
-
Step 400
400
#D9858F
oklch(70.7% 0.104 12.4)
-
Step 500
500
#CC6473
oklch(63.1% 0.132 12.6)
-
Step 600
600
#B7485B
oklch(55.5% 0.144 12.7)
-
Step 700
700
#9D394B
oklch(49% 0.133 12.7)
-
Step 800
800
#80303E
oklch(42.7% 0.111 12.5)
-
Step 900
900
#672B35
oklch(37.6% 0.087 11.9)
-
Step 950
950 (this color)
#210308
oklch(16.6% 0.055 12.6)
#210308 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) | #090908 | 0.061 |
| Deuteranopia (no green cones) | #111007 | 0.058 |
| Tritanopia (no blue cones) | #250005 | 0.013 |
| Achromatopsia (no color) | #0D0D0D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210308
#210308
oklch(16.6% 0.055 12.6)
- #001212
#001212
oklch(16.5% 0.028 194.8)
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 #210308, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.026
- Almost Black #070D0D ΔE 0.066
- Dark Maroon #3C0008 ΔE 0.069
- Rich Navy #001219 ΔE 0.083
- Deep Brown #410200 ΔE 0.085
- Very Dark Purple #2A0134 ΔE 0.091
- Rich Black #0D1B2A ΔE 0.094
- Midnight Purple #280137 ΔE 0.096
Use #210308 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.