#210307
Closest named color: Very Dark Brown (#1D0200). oklch(16.6% 0.055 15), rgb(33, 3, 7).
Aa
White text reads best on this color (19.43:1).
About this color
#210307 is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.055 and its hue 15°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.024 away. White text reads best on it, at 19.43:1.
| 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 | 19.43:1 |
Values
| HEX | #210307 |
| RGB | rgb(33, 3, 7) |
| HSL | hsl(352, 83%, 7%) |
| OKLCH | oklch(16.6% 0.055 15) |
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 #210307 | 19.43:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210307 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #210307 text on white | 19.43:1 | AAA | Lc 105.3 | Preferred for body text |
| #210307 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
#FBF3F3
oklch(97% 0.009 17.3)
-
Step 100
100
#F6E5E6
oklch(93.6% 0.019 13.4)
-
Step 200
200
#F0D0D1
oklch(88.5% 0.036 15.7)
-
Step 300
300
#E7B0B3
oklch(80.8% 0.064 14.9)
-
Step 400
400
#D9858C
oklch(70.7% 0.104 14.7)
-
Step 500
500
#CC646F
oklch(63% 0.132 15)
-
Step 600
600
#B84958
oklch(55.7% 0.144 14.9)
-
Step 700
700
#9E3948
oklch(49.1% 0.134 14.7)
-
Step 800
800
#80303B
oklch(42.6% 0.111 14.8)
-
Step 900
900
#672C33
oklch(37.7% 0.085 14.7)
-
Step 950
950 (this color)
#210307
oklch(16.6% 0.055 15)
#210307 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) | #090907 | 0.061 |
| Deuteranopia (no green cones) | #120F06 | 0.054 |
| Tritanopia (no blue cones) | #250004 | 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°).
- #210307
#210307
oklch(16.6% 0.055 15)
- #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 #210307, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.024
- Almost Black #070D0D ΔE 0.066
- Dark Maroon #3C0008 ΔE 0.069
- Rich Navy #001219 ΔE 0.084
- Deep Brown #410200 ΔE 0.084
- Very Dark Purple #2A0134 ΔE 0.093
- Rich Black #0D1B2A ΔE 0.095
- Midnight Purple #280137 ΔE 0.098
Use #210307 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.