#613B40
Closest named color: Purple Brown (#673A3F). oklch(39.9% 0.054 11.2), rgb(97, 59, 64).
Aa
White text reads best on this color (9.51:1).
About this color
#613B40 is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.054 and its hue 11°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.012 away. White text reads best on it, at 9.51:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #613B40 |
| RGB | rgb(97, 59, 64) |
| HSL | hsl(352, 24%, 31%) |
| OKLCH | oklch(39.9% 0.054 11.2) |
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 #613B40 | 9.51:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #613B40 | 2.20:1 | Fails | Lc 12.1 | Not readable |
| #613B40 text on white | 9.51:1 | AAA | Lc 91.9 | Preferred for body text |
| #613B40 text on black | 2.20:1 | Fails | Lc -10.5 | 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F2E7E8
oklch(93.7% 0.012 11)
-
Step 200
200
#E8D3D5
oklch(88.5% 0.023 11)
-
Step 300
300
#D9B6BA
oklch(80.8% 0.041 10.3)
-
Step 400
400
#C59096
oklch(70.6% 0.065 11.3)
-
Step 500
500
#B6747D
oklch(63.1% 0.084 10.9)
-
Step 600
600
#A15C66
oklch(55.6% 0.091 11.1)
-
Step 700
700
#894C55
oklch(49.2% 0.083 11.1)
-
Step 800
800
#703E45
oklch(42.7% 0.07 11.5)
-
Step 900
900 (this color)
#613B40
oklch(39.9% 0.054 11.2)
-
Step 950
950
#351F22
oklch(26.9% 0.035 10.7)
#613B40 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) | #424140 | 0.058 |
| Deuteranopia (no green cones) | #4B483F | 0.054 |
| Tritanopia (no blue cones) | #68383D | 0.015 |
| Achromatopsia (no color) | #464646 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613B40
#613B40
oklch(39.9% 0.054 11.2)
- #1E514E
#1E514E
oklch(40% 0.054 189.9)
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 #613B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.012
- Brownish Purple #76424E ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.067
- Chestnut #742802 ΔE 0.075
- Mud Brown #60460F ΔE 0.079
- Onyx #343A40 ΔE 0.082
- Dark Slate Gray #2F4F4F ΔE 0.092
- Red Brown #8B2E16 ΔE 0.093
Use #613B40 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.