#613F37
Closest named color: Purple Brown (#673A3F). oklch(40.5% 0.05 33.8), rgb(97, 63, 55).
Aa
White text reads best on this color (9.23:1).
About this color
#613F37 is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.050 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.025 away. White text reads best on it, at 9.23:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #613F37 |
| RGB | rgb(97, 63, 55) |
| HSL | hsl(11, 28%, 30%) |
| OKLCH | oklch(40.5% 0.05 33.8) |
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 #613F37 | 9.23:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #613F37 | 2.27:1 | Fails | Lc 12.8 | Not readable |
| #613F37 text on white | 9.23:1 | AAA | Lc 91.2 | Preferred for body text |
| #613F37 text on black | 2.27:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#EFE8E6
oklch(93.6% 0.008 36.6)
-
Step 200
200
#E4D6D2
oklch(88.6% 0.016 36.5)
-
Step 300
300
#D3BAB4
oklch(80.9% 0.03 33.7)
-
Step 400
400
#BC978E
oklch(70.8% 0.047 34)
-
Step 500
500
#AA7D72
oklch(63.1% 0.059 34.2)
-
Step 600
600
#95655A
oklch(55.5% 0.065 33.4)
-
Step 700
700
#7F544A
oklch(49% 0.06 33.7)
-
Step 800
800 (this color)
#613F37
oklch(40.5% 0.05 33.8)
-
Step 900
900
#543A34
oklch(37.6% 0.039 33.4)
-
Step 950
950
#31221F
oklch(26.9% 0.024 31.5)
#613F37 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) | #474336 | 0.048 |
| Deuteranopia (no green cones) | #4F4A37 | 0.044 |
| Tritanopia (no blue cones) | #683A3D | 0.023 |
| Achromatopsia (no color) | #474747 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613F37
#613F37
oklch(40.5% 0.05 33.8)
- #255059
#255059
oklch(40.5% 0.05 213.1)
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 #613F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.025
- Brownish Purple #76424E ΔE 0.056
- Mud Brown #60460F ΔE 0.057
- Charcoal Grey #3C4142 ΔE 0.066
- Chestnut #742802 ΔE 0.069
- Milk Chocolate #7F4E1E ΔE 0.084
- Green Brown #544E03 ΔE 0.085
- Onyx #343A40 ΔE 0.085
Use #613F37 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.