#210504
Closest named color: Very Dark Brown (#1D0200). oklch(17% 0.05 27), rgb(33, 5, 4).
Aa
White text reads best on this color (19.29:1).
About this color
#210504 is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.050 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.020 away. White text reads best on it, at 19.29:1.
| Hue family | Reds |
| Lightness | very dark (17%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.08:1 |
| White text | 19.29:1 |
Values
| HEX | #210504 |
| RGB | rgb(33, 5, 4) |
| HSL | hsl(2, 78%, 7%) |
| OKLCH | oklch(17% 0.05 27) |
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 #210504 | 19.29:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210504 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #210504 text on white | 19.29:1 | AAA | Lc 105.3 | Preferred for body text |
| #210504 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F5E6E4
oklch(93.6% 0.017 26.7)
-
Step 200
200
#EED1CD
oklch(88.4% 0.033 27.1)
-
Step 300
300
#E5B3AC
oklch(81% 0.059 27.6)
-
Step 400
400
#D68980
oklch(70.7% 0.096 27)
-
Step 500
500
#C96A60
oklch(63.2% 0.122 27.3)
-
Step 600
600
#B44F47
oklch(55.6% 0.133 26.8)
-
Step 700
700
#9A4039
oklch(49.1% 0.122 26.9)
-
Step 800
800
#7D352F
oklch(42.6% 0.102 27)
-
Step 900
900
#652F2A
oklch(37.7% 0.079 26.9)
-
Step 950
950 (this color)
#210504
oklch(17% 0.05 27)
#210504 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) | #0C0A04 | 0.053 |
| Deuteranopia (no green cones) | #131003 | 0.049 |
| Tritanopia (no blue cones) | #250105 | 0.017 |
| Achromatopsia (no color) | #0E0E0E | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210504
#210504
oklch(17% 0.05 27)
- #001316
#001316
oklch(17.1% 0.029 207.2)
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 #210504, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.020
- Almost Black #070D0D ΔE 0.063
- Dark Maroon #3C0008 ΔE 0.069
- Rich Navy #001219 ΔE 0.081
- Deep Brown #410200 ΔE 0.081
- Dark Brown #341C02 ΔE 0.090
- Rich Black #0D1B2A ΔE 0.093
- Very Dark Purple #2A0134 ΔE 0.101
Use #210504 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.