#21100F
Closest named color: Very Dark Brown (#1D0200). oklch(19.7% 0.029 23.7), rgb(33, 16, 15).
Aa
White text reads best on this color (18.32:1).
About this color
#21100F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.053 away. White text reads best on it, at 18.32:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.14:1 |
| White text | 18.32:1 |
Values
| HEX | #21100F |
| RGB | rgb(33, 16, 15) |
| HSL | hsl(3, 38%, 9%) |
| OKLCH | oklch(19.7% 0.029 23.7) |
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 #21100F | 18.32:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #21100F | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #21100F text on white | 18.32:1 | AAA | Lc 104.9 | Preferred for body text |
| #21100F 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#F0E7E7
oklch(93.5% 0.01 17.3)
-
Step 200
200
#E6D5D3
oklch(88.6% 0.019 25.6)
-
Step 300
300
#D6B9B6
oklch(81% 0.034 24.9)
-
Step 400
400
#C19490
oklch(70.8% 0.055 24.4)
-
Step 500
500
#B07975
oklch(63.1% 0.07 23.9)
-
Step 600
600
#9B615E
oklch(55.5% 0.076 23)
-
Step 700
700
#84504D
oklch(49% 0.071 23.5)
-
Step 800
800
#6C423F
oklch(42.7% 0.059 24.3)
-
Step 900
900
#583836
oklch(37.8% 0.046 23.4)
-
Step 950
950 (this color)
#21100F
oklch(19.7% 0.029 23.7)
#21100F 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) | #14130F | 0.030 |
| Deuteranopia (no green cones) | #18160F | 0.028 |
| Tritanopia (no blue cones) | #240E10 | 0.010 |
| Achromatopsia (no color) | #151515 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21100F
#21100F
oklch(19.7% 0.029 23.7)
- #03191B
#03191B
oklch(19.6% 0.029 203)
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 #21100F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.053
- Almost Black #070D0D ΔE 0.059
- Rich Black #0D1B2A ΔE 0.063
- Rich Navy #001219 ΔE 0.066
- Dark Brown #341C02 ΔE 0.068
- Dark Maroon #3C0008 ΔE 0.068
- Jet #212529 ΔE 0.074
- Deep Brown #410200 ΔE 0.077
Use #21100F 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.