#5B1D18
Closest named color: Reddy Brown (#6E1005). oklch(32.7% 0.092 27.9), rgb(91, 29, 24).
Aa
White text reads best on this color (12.85:1).
About this color
#5B1D18 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.092 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.043 away. White text reads best on it, at 12.85:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.092) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.63:1 |
| White text | 12.85:1 |
Values
| HEX | #5B1D18 |
| RGB | rgb(91, 29, 24) |
| HSL | hsl(4, 58%, 23%) |
| OKLCH | oklch(32.7% 0.092 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 #5B1D18 | 12.85:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #5B1D18 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #5B1D18 text on white | 12.85:1 | AAA | Lc 98.3 | Preferred for body text |
| #5B1D18 text on black | 1.63:1 | 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 900.
-
Step 50
50
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CB
oklch(88.5% 0.039 27.8)
-
Step 300
300
#EAB0A8
oklch(80.8% 0.069 27.6)
-
Step 400
400
#DD857A
oklch(70.7% 0.11 27.8)
-
Step 500
500
#D16358
oklch(63.1% 0.141 27.6)
-
Step 600
600
#BD473D
oklch(55.7% 0.154 27.9)
-
Step 700
700
#A2372F
oklch(49% 0.143 27.8)
-
Step 800
800
#842F28
oklch(42.8% 0.119 27.8)
-
Step 900
900 (this color)
#5B1D18
oklch(32.7% 0.092 27.9)
-
Step 950
950
#3E1A16
oklch(27% 0.057 28)
#5B1D18 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) | #2E2917 | 0.097 |
| Deuteranopia (no green cones) | #3D3716 | 0.090 |
| Tritanopia (no blue cones) | #640E1C | 0.030 |
| Achromatopsia (no color) | #323232 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B1D18
#5B1D18
oklch(32.7% 0.092 27.9)
- #003C44
#003C44
oklch(32.6% 0.056 209.4)
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 #5B1D18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.043
- Claret #680018 ΔE 0.043
- Burgundy #610023 ΔE 0.049
- Blood #770001 ΔE 0.062
- Chestnut #742802 ΔE 0.068
- Chocolate Brown #411900 ΔE 0.068
- Mahogany #4A0100 ΔE 0.070
- Wine Red #7B0323 ΔE 0.074
Use #5B1D18 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.