#5B180D
Closest named color: Reddy Brown (#6E1005). oklch(31.9% 0.1 31.9), rgb(91, 24, 13).
Aa
White text reads best on this color (13.28:1).
About this color
#5B180D is a dark, moderately saturated red. In OKLCH its lightness is 32%, its chroma 0.100 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.041 away. White text reads best on it, at 13.28:1.
| Hue family | Reds |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.100) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.58:1 |
| White text | 13.28:1 |
Values
| HEX | #5B180D |
| RGB | rgb(91, 24, 13) |
| HSL | hsl(8, 75%, 20%) |
| OKLCH | oklch(31.9% 0.1 31.9) |
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 #5B180D | 13.28:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #5B180D | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #5B180D text on white | 13.28:1 | AAA | Lc 98.8 | Preferred for body text |
| #5B180D text on black | 1.58:1 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FFE3DC
oklch(93.7% 0.032 34.3)
-
Step 200
200
#FFCBC0
oklch(88.5% 0.061 32.1)
-
Step 300
300
#FFA694
oklch(80.9% 0.109 32)
-
Step 400
400
#FF6B51
oklch(70.7% 0.186 32)
-
Step 500
500
#F92C00
oklch(63.1% 0.24 31.9)
-
Step 600
600
#D22300
oklch(55.5% 0.211 31.9)
-
Step 700
700
#B21C00
oklch(49.1% 0.187 31.9)
-
Step 800
800
#931600
oklch(42.7% 0.162 32)
-
Step 900
900
#7C1000
oklch(37.7% 0.143 31.8)
-
Step 950
950 (this color)
#5B180D
oklch(31.9% 0.1 31.9)
#5B180D 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) | #2C260B | 0.104 |
| Deuteranopia (no green cones) | #3C350A | 0.096 |
| Tritanopia (no blue cones) | #650316 | 0.036 |
| Achromatopsia (no color) | #303030 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B180D
#5B180D
oklch(31.9% 0.1 31.9)
- #003A43
#003A43
oklch(32% 0.056 211.6)
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 #5B180D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.041
- Claret #680018 ΔE 0.042
- Burgundy #610023 ΔE 0.051
- Blood #770001 ΔE 0.061
- Mahogany #4A0100 ΔE 0.061
- Chocolate Brown #411900 ΔE 0.062
- Chestnut #742802 ΔE 0.071
- Wine Red #7B0323 ΔE 0.077
Use #5B180D 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.