#550B09
Closest named color: Mahogany (#4A0100). oklch(29.2% 0.106 27.9), rgb(85, 11, 9).
Aa
White text reads best on this color (14.60:1).
About this color
#550B09 is a dark, moderately saturated red. In OKLCH its lightness is 29%, its chroma 0.106 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.035 away. White text reads best on it, at 14.60:1.
| Hue family | Reds |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.43:1 |
| White text | 14.60:1 |
Values
| HEX | #550B09 |
| RGB | rgb(85, 11, 9) |
| HSL | hsl(2, 81%, 18%) |
| OKLCH | oklch(29.2% 0.106 27.9) |
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 #550B09 | 14.60:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #550B09 | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #550B09 text on white | 14.60:1 | AAA | Lc 100.3 | Preferred for body text |
| #550B09 text on black | 1.43:1 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FFE2DE
oklch(93.5% 0.033 27.1)
-
Step 200
200
#FFCBC3
oklch(88.6% 0.06 28.4)
-
Step 300
300
#FFA59A
oklch(80.9% 0.109 27.3)
-
Step 400
400
#FF695C
oklch(70.7% 0.186 27.7)
-
Step 500
500
#FF0D19
oklch(63.1% 0.254 27.9)
-
Step 600
600
#D90010
oklch(55.6% 0.227 27.9)
-
Step 700
700
#B8000C
oklch(49.2% 0.201 27.9)
-
Step 800
800
#980008
oklch(42.7% 0.175 27.8)
-
Step 900
900
#800005
oklch(37.7% 0.154 28)
-
Step 950
950 (this color)
#550B09
oklch(29.2% 0.106 27.9)
#550B09 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) | #231E08 | 0.114 |
| Deuteranopia (no green cones) | #352E06 | 0.103 |
| Tritanopia (no blue cones) | #5F000C | 0.024 |
| Achromatopsia (no color) | #292929 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #550B09
#550B09
oklch(29.2% 0.106 27.9)
- #003339
#003339
oklch(29.4% 0.05 207.3)
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 #550B09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.035
- Claret #680018 ΔE 0.047
- Burgundy #610023 ΔE 0.047
- Chocolate Brown #411900 ΔE 0.052
- Deep Brown #410200 ΔE 0.056
- Reddy Brown #6E1005 ΔE 0.061
- Dark Maroon #3C0008 ΔE 0.070
- Blood #770001 ΔE 0.077
Use #550B09 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.