#210F18
Closest named color: Rich Black (#0D1B2A). oklch(19.8% 0.034 349.3), rgb(33, 15, 24).
Aa
White text reads best on this color (18.32:1).
About this color
#210F18 is a very dark, muted red. In OKLCH its lightness is 20%, its chroma 0.034 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.056 away. White text reads best on it, at 18.32:1.
| Hue family | Reds |
| Lightness | very dark (20%) |
| Chroma | muted (0.034) |
| Temperature | warm |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.32:1 |
Values
| HEX | #210F18 |
| RGB | rgb(33, 15, 24) |
| HSL | hsl(330, 38%, 9%) |
| OKLCH | oklch(19.8% 0.034 349.3) |
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 #210F18 | 18.32:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #210F18 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #210F18 text on white | 18.32:1 | AAA | Lc 104.9 | Preferred for body text |
| #210F18 text on black | 1.14:1 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#F0E7EB
oklch(93.6% 0.011 348.4)
-
Step 200
200
#E5D3DB
oklch(88.4% 0.023 348.8)
-
Step 300
300
#D6B7C4
oklch(81% 0.039 350.8)
-
Step 400
400
#C091A7
oklch(70.8% 0.064 349.1)
-
Step 500
500
#AF7591
oklch(63.1% 0.081 349.2)
-
Step 600
600
#9A5D7B
oklch(55.6% 0.089 349.5)
-
Step 700
700
#844C68
oklch(49.1% 0.084 349.3)
-
Step 800
800
#6B3F55
oklch(42.8% 0.068 349)
-
Step 900
900
#573646
oklch(37.8% 0.053 349.4)
-
Step 950
950 (this color)
#210F18
oklch(19.8% 0.034 349.3)
#210F18 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) | #111318 | 0.036 |
| Deuteranopia (no green cones) | #151618 | 0.034 |
| Tritanopia (no blue cones) | #230F12 | 0.013 |
| Achromatopsia (no color) | #151515 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210F18
#210F18
oklch(19.8% 0.034 349.3)
- #041B13
#041B13
oklch(20% 0.034 167.8)
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 #210F18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.056
- Very Dark Brown #1D0200 ΔE 0.061
- Almost Black #070D0D ΔE 0.063
- Rich Navy #001219 ΔE 0.065
- Dark Maroon #3C0008 ΔE 0.069
- Very Dark Purple #2A0134 ΔE 0.073
- Jet #212529 ΔE 0.074
- Dark #1B2431 ΔE 0.074
Use #210F18 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.