#37191B
Closest named color: Dark Brown (#341C02). oklch(25.7% 0.048 16.8), rgb(55, 25, 27).
Aa
White text reads best on this color (15.94:1).
About this color
#37191B is a dark, muted red. In OKLCH its lightness is 26%, its chroma 0.048 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Brown (#341C02), ΔE 0.042 away. White text reads best on it, at 15.94:1.
| Hue family | Reds |
| Lightness | dark (26%) |
| Chroma | muted (0.048) |
| Temperature | warm |
| Nearest name | Dark Brown (#341C02) |
| Black text | 1.31:1 |
| White text | 15.94:1 |
Values
| HEX | #37191B |
| RGB | rgb(55, 25, 27) |
| HSL | hsl(356, 38%, 16%) |
| OKLCH | oklch(25.7% 0.048 16.8) |
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 #37191B | 15.94:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #37191B | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #37191B text on white | 15.94:1 | AAA | Lc 102.7 | Preferred for body text |
| #37191B text on black | 1.31:1 | 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
#FAF3F4
oklch(97% 0.008 7.3)
-
Step 100
100
#F5E6E6
oklch(93.7% 0.016 17.4)
-
Step 200
200
#EDD1D2
oklch(88.4% 0.031 15.3)
-
Step 300
300
#E3B2B4
oklch(80.8% 0.057 15.7)
-
Step 400
400
#D3898D
oklch(70.7% 0.091 16.1)
-
Step 500
500
#C56A70
oklch(63% 0.116 16.8)
-
Step 600
600
#B05059
oklch(55.5% 0.125 16.3)
-
Step 700
700
#974149
oklch(49.1% 0.116 16.7)
-
Step 800
800
#7B363C
oklch(42.7% 0.096 16.7)
-
Step 900
900
#632F33
oklch(37.6% 0.075 16.6)
-
Step 950
950 (this color)
#37191B
oklch(25.7% 0.048 16.8)
#37191B 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) | #1F1E1B | 0.052 |
| Deuteranopia (no green cones) | #27241A | 0.047 |
| Tritanopia (no blue cones) | #3C151A | 0.014 |
| Achromatopsia (no color) | #222222 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37191B
#37191B
oklch(25.7% 0.048 16.8)
- #002A2A
#002A2A
oklch(25.8% 0.044 194.8)
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 #37191B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Brown #341C02 ΔE 0.042
- Chocolate Brown #411900 ΔE 0.043
- Deep Brown #410200 ΔE 0.053
- Dark Maroon #3C0008 ΔE 0.054
- Jet #212529 ΔE 0.054
- Mahogany #4A0100 ΔE 0.059
- Dark #1B2431 ΔE 0.066
- Dark Plum #3F012C ΔE 0.068
Use #37191B 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.