#5B1F18
Closest named color: Reddy Brown (#6E1005). oklch(33% 0.09 29.4), rgb(91, 31, 24).
Aa
White text reads best on this color (12.69:1).
About this color
#5B1F18 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.090 and its hue 29°. 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 12.69:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.090) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.65:1 |
| White text | 12.69:1 |
Values
| HEX | #5B1F18 |
| RGB | rgb(91, 31, 24) |
| HSL | hsl(6, 58%, 23%) |
| OKLCH | oklch(33% 0.09 29.4) |
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 #5B1F18 | 12.69:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #5B1F18 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #5B1F18 text on white | 12.69:1 | AAA | Lc 98.1 | Preferred for body text |
| #5B1F18 text on black | 1.65:1 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D1CB
oklch(88.6% 0.037 30.4)
-
Step 300
300
#E9B1A8
oklch(80.9% 0.067 29)
-
Step 400
400
#DC8679
oklch(70.8% 0.108 29.3)
-
Step 500
500
#CF6556
oklch(63% 0.137 29.7)
-
Step 600
600
#BB493C
oklch(55.6% 0.15 29.2)
-
Step 700
700
#A1392E
oklch(49.1% 0.14 29.1)
-
Step 800
800
#823027
oklch(42.6% 0.115 29)
-
Step 900
900 (this color)
#5B1F18
oklch(33% 0.09 29.4)
-
Step 950
950
#3E1A15
oklch(26.9% 0.058 29.5)
#5B1F18 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) | #2F2B17 | 0.094 |
| Deuteranopia (no green cones) | #3E3816 | 0.087 |
| Tritanopia (no blue cones) | #64121E | 0.031 |
| Achromatopsia (no color) | #333333 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B1F18
#5B1F18
oklch(33% 0.09 29.4)
- #003D45
#003D45
oklch(33% 0.057 209.2)
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 #5B1F18, 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 0.046
- Burgundy #610023 ΔE 0.053
- Blood #770001 ΔE 0.063
- Chestnut #742802 ΔE 0.065
- Chocolate Brown #411900 ΔE 0.069
- Mahogany #4A0100 ΔE 0.074
- Wine Red #7B0323 ΔE 0.075
Use #5B1F18 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.