#550000
Closest named color: Mahogany (#4A0100). oklch(28.2% 0.116 29.2), rgb(85, 0, 0).
Aa
White text reads best on this color (15.14:1).
About this color
#550000 is a dark, moderately saturated red. In OKLCH its lightness is 28%, its chroma 0.116 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.027 away. White text reads best on it, at 15.14:1.
| Hue family | Reds |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.116) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.38:1 |
| White text | 15.14:1 |
Values
| HEX | #550000 |
| RGB | rgb(85, 0, 0) |
| HSL | hsl(0, 100%, 17%) |
| OKLCH | oklch(28.2% 0.116 29.2) |
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 #550000 | 15.14:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #550000 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #550000 text on white | 15.14:1 | AAA | Lc 100.5 | Preferred for body text |
| #550000 text on black | 1.38:1 | 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
#FFE2DD
oklch(93.5% 0.033 29.4)
-
Step 200
200
#FFCBC2
oklch(88.5% 0.061 29.7)
-
Step 300
300
#FFA698
oklch(81% 0.108 29.4)
-
Step 400
400
#FF6A58
oklch(70.7% 0.185 29.4)
-
Step 500
500
#FF0F09
oklch(63.1% 0.255 29.2)
-
Step 600
600
#D90000
oklch(55.6% 0.228 29.2)
-
Step 700
700
#B80000
oklch(49.1% 0.202 29.2)
-
Step 800
800
#980000
oklch(42.7% 0.175 29.2)
-
Step 900
900
#800000
oklch(37.7% 0.155 29.2)
-
Step 950
950 (this color)
#550000
oklch(28.2% 0.116 29.2)
#550000 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) | #1F1A00 | 0.127 |
| Deuteranopia (no green cones) | #332C00 | 0.112 |
| Tritanopia (no blue cones) | #5F0001 | 0.024 |
| Achromatopsia (no color) | #262626 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #550000
#550000
oklch(28.2% 0.116 29.2)
- #003036
#003036
oklch(28.3% 0.049 207.9)
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 #550000, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.027
- Deep Brown #410200 ΔE 0.049
- Claret #680018 ΔE 0.053
- Burgundy #610023 ΔE 0.053
- Chocolate Brown #411900 ΔE 0.056
- Dark Maroon #3C0008 ΔE 0.064
- Reddy Brown #6E1005 ΔE 0.067
- Blood #770001 ΔE 0.081
Use #550000 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.