#510009
Closest named color: Mahogany (#4A0100). oklch(27.4% 0.111 23.6), rgb(81, 0, 9).
Aa
White text reads best on this color (15.51:1).
About this color
#510009 is a dark, moderately saturated red. In OKLCH its lightness is 27%, its chroma 0.111 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.021 away. White text reads best on it, at 15.51:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.111) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.35:1 |
| White text | 15.51:1 |
Values
| HEX | #510009 |
| RGB | rgb(81, 0, 9) |
| HSL | hsl(353, 100%, 16%) |
| OKLCH | oklch(27.4% 0.111 23.6) |
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 #510009 | 15.51:1 | AAA | Lc -103.9 | Preferred for body text |
| Black text on #510009 | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #510009 text on white | 15.51:1 | AAA | Lc 101.0 | Preferred for body text |
| #510009 text on black | 1.35:1 | 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
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FFE2E0
oklch(93.6% 0.032 22.5)
-
Step 200
200
#FFCAC6
oklch(88.4% 0.061 23.4)
-
Step 300
300
#FFA59F
oklch(81% 0.108 23.9)
-
Step 400
400
#FF6867
oklch(70.7% 0.185 23.4)
-
Step 500
500
#FF0233
oklch(63.1% 0.255 23.7)
-
Step 600
600
#D8002A
oklch(55.6% 0.225 23.5)
-
Step 700
700
#B70022
oklch(49.2% 0.199 23.5)
-
Step 800
800
#97001A
oklch(42.7% 0.172 23.6)
-
Step 900
900
#7F0014
oklch(37.6% 0.152 23.6)
-
Step 950
950 (this color)
#510009
oklch(27.4% 0.111 23.6)
#510009 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) | #1D1908 | 0.122 |
| Deuteranopia (no green cones) | #302A06 | 0.111 |
| Tritanopia (no blue cones) | #5A0004 | 0.023 |
| Achromatopsia (no color) | #242424 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #510009
#510009
oklch(27.4% 0.111 23.6)
- #002E32
#002E32
oklch(27.5% 0.047 203.9)
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 #510009, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.021
- Deep Brown #410200 ΔE 0.042
- Burgundy #610023 ΔE 0.052
- Dark Maroon #3C0008 ΔE 0.053
- Chocolate Brown #411900 ΔE 0.056
- Claret #680018 ΔE 0.058
- Dark Plum #3F012C ΔE 0.077
- Reddy Brown #6E1005 ΔE 0.078
Use #510009 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.