#613B31
Closest named color: Purple Brown (#673A3F). oklch(39.5% 0.057 35.5), rgb(97, 59, 49).
Aa
White text reads best on this color (9.64:1).
About this color
#613B31 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.057 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.026 away. White text reads best on it, at 9.64:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.057) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #613B31 |
| RGB | rgb(97, 59, 49) |
| HSL | hsl(13, 33%, 29%) |
| OKLCH | oklch(39.5% 0.057 35.5) |
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 #613B31 | 9.64:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #613B31 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #613B31 text on white | 9.64:1 | AAA | Lc 92.2 | Preferred for body text |
| #613B31 text on black | 2.17:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F2E7E4
oklch(93.6% 0.013 35.7)
-
Step 200
200
#E8D4CF
oklch(88.5% 0.023 34.3)
-
Step 300
300
#DAB8AE
oklch(80.9% 0.042 37)
-
Step 400
400
#C79284
oklch(70.7% 0.068 35.3)
-
Step 500
500
#B87665
oklch(63.1% 0.088 35.2)
-
Step 600
600
#A35E4C
oklch(55.6% 0.095 35.5)
-
Step 700
700
#8B4D3D
oklch(49% 0.088 35.4)
-
Step 800
800
#714033
oklch(42.8% 0.072 35.7)
-
Step 900
900 (this color)
#613B31
oklch(39.5% 0.057 35.5)
-
Step 950
950
#36201A
oklch(27% 0.036 36)
#613B31 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) | #444030 | 0.055 |
| Deuteranopia (no green cones) | #4D4831 | 0.051 |
| Tritanopia (no blue cones) | #693538 | 0.027 |
| Achromatopsia (no color) | #454545 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613B31
#613B31
oklch(39.5% 0.057 35.5)
- #1B4E5A
#1B4E5A
oklch(39.5% 0.057 216.1)
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 #613B31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.026
- Mud Brown #60460F ΔE 0.058
- Chestnut #742802 ΔE 0.060
- Brownish Purple #76424E ΔE 0.063
- Charcoal Grey #3C4142 ΔE 0.068
- Onyx #343A40 ΔE 0.085
- Red Brown #8B2E16 ΔE 0.085
- Reddy Brown #6E1005 ΔE 0.086
Use #613B31 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.